diff --git a/theme/afterburner/settings.php b/theme/afterburner/settings.php
index 21722d7151c..f96867b60ee 100644
--- a/theme/afterburner/settings.php
+++ b/theme/afterburner/settings.php
@@ -18,6 +18,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('footnotedesc', 'theme_afterburner');
     $default = '';
     $setting = new admin_setting_confightmleditor($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -26,6 +27,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('customcssdesc', 'theme_afterburner');
     $default = '';
     $setting = new admin_setting_configtextarea($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
 }
\ No newline at end of file
diff --git a/theme/anomaly/settings.php b/theme/anomaly/settings.php
index 73f5aa9f125..b097584c805 100644
--- a/theme/anomaly/settings.php
+++ b/theme/anomaly/settings.php
@@ -10,6 +10,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('taglinedesc', 'theme_anomaly');
     $default = '';
     $setting = new admin_setting_configtext($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -18,6 +19,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('customcssdesc', 'theme_anomaly');
     $default = '';
     $setting = new admin_setting_configtextarea($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
 }
diff --git a/theme/arialist/settings.php b/theme/arialist/settings.php
index 68dc22256bb..4510dcec6cf 100644
--- a/theme/arialist/settings.php
+++ b/theme/arialist/settings.php
@@ -12,6 +12,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('logo','theme_arialist');
     $description = get_string('logodesc', 'theme_arialist');
     $setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Tagline setting
@@ -19,6 +20,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('tagline','theme_arialist');
     $description = get_string('taglinedesc', 'theme_arialist');
     $setting = new admin_setting_configtext($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Link colour setting
@@ -28,6 +30,7 @@ if ($ADMIN->fulltree) {
     $default = '#f25f0f';
     $previewconfig = array('selector'=>'.block .content', 'style'=>'linkcolor');
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block region width
@@ -37,6 +40,7 @@ if ($ADMIN->fulltree) {
     $default = 250;
     $choices = array(180=>'180px', 190=>'190px', 200=>'200px', 210=>'210px', 220=>'220px', 240=>'240px', 250=>'250px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -44,5 +48,6 @@ if ($ADMIN->fulltree) {
     $title = get_string('customcss','theme_arialist');
     $description = get_string('customcssdesc', 'theme_arialist');
     $setting = new admin_setting_configtextarea($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 }
\ No newline at end of file
diff --git a/theme/brick/settings.php b/theme/brick/settings.php
index 705295ddf3e..b73ac26c497 100644
--- a/theme/brick/settings.php
+++ b/theme/brick/settings.php
@@ -10,6 +10,7 @@ $name = 'theme_brick/logo';
 $title = get_string('logo','theme_brick');
 $description = get_string('logodesc', 'theme_brick');
 $setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // link color setting
@@ -19,6 +20,7 @@ $description = get_string('linkcolordesc', 'theme_brick');
 $default = '#06365b';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // link hover color setting
@@ -28,6 +30,7 @@ $description = get_string('linkhoverdesc', 'theme_brick');
 $default = '#5487ad';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // main color setting
@@ -37,6 +40,7 @@ $description = get_string('maincolordesc', 'theme_brick');
 $default = '#8e2800';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // main color accent setting
@@ -46,6 +50,7 @@ $description = get_string('maincolorlinkdesc', 'theme_brick');
 $default = '#fff0a5';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // heading color setting
@@ -55,6 +60,7 @@ $description = get_string('headingcolordesc', 'theme_brick');
 $default = '#5c3500';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 }
\ No newline at end of file
diff --git a/theme/formal_white/settings.php b/theme/formal_white/settings.php
index 67938d096f3..e2583cfe648 100644
--- a/theme/formal_white/settings.php
+++ b/theme/formal_white/settings.php
@@ -14,6 +14,7 @@ if ($ADMIN->fulltree) {
     $default = '13';
     $choices = array(11=>'11px', 12=>'12px', 13=>'13px', 14=>'14px', 15=>'15px', 16=>'16px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // moodle 1.* like setting
@@ -22,6 +23,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('noframedesc', 'theme_formal_white');
     $default = '0';
     $setting = new admin_setting_configcheckbox($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Frame margin
@@ -31,6 +33,7 @@ if ($ADMIN->fulltree) {
     $default = '15';
     $choices = array(0=>'0px', 5=>'5px', 10=>'10px', 15=>'15px', 20=>'20px', 25=>'25px', 30=>'30px', 35=>'35px', 40=>'40px', 45=>'45px', 50=>'50px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Display logo or heading
@@ -40,6 +43,7 @@ if ($ADMIN->fulltree) {
     $default = '1';
     $choices = array(1=>get_string('displaylogo', 'theme_formal_white'), 0=>get_string('displayheading', 'theme_formal_white'));
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom site logo setting
@@ -48,6 +52,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('customlogourldesc', 'theme_formal_white');
     $default = '';
     $setting = new admin_setting_configtext($name, $title, $description, $default, PARAM_RAW); // we want it accepting ../ at the beginning. Security is not at its top but Moodle trusts admins.
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom front page site logo setting
@@ -56,6 +61,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('frontpagelogourldesc', 'theme_formal_white');
     $default = '';
     $setting = new admin_setting_configtext($name, $title, $description, $default, PARAM_RAW); // we want it accepting ../ at the beginning. Security is not at its top but Moodle trusts admins.
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // page header background colour setting
@@ -65,6 +71,7 @@ if ($ADMIN->fulltree) {
     $default = '#E3DFD4';
     $previewconfig = array('selector'=>'#page-header', 'style'=>'backgroundColor');
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // creditstomoodleorg: ctmo
@@ -74,6 +81,7 @@ if ($ADMIN->fulltree) {
     $default = '2';
     $choices = array(2 => get_string('ctmo_ineverypage', 'theme_formal_white'), 1 => get_string('ctmo_onfrontpageonly', 'theme_formal_white'), 0 => get_string('ctmo_no', 'theme_formal_white'));
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block region width
@@ -83,6 +91,7 @@ if ($ADMIN->fulltree) {
     $default = '200';
     $choices = array(150=>'150px', 170=>'170px', 200=>'200px', 240=>'240px', 290=>'290px', 350=>'350px', 420=>'420px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block padding
@@ -92,6 +101,7 @@ if ($ADMIN->fulltree) {
     $default = '8';
     $choices = array(1=>'1px', 2=>'2px', 4=>'4px', 8=>'8px', 12=>'12px', 16=>'16px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block content background colour setting
@@ -101,6 +111,7 @@ if ($ADMIN->fulltree) {
     $default = '#F6F6F6';
     $previewconfig = array('selector'=>'.block .content', 'style'=>'backgroundColor');
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Left column colour setting
@@ -110,6 +121,7 @@ if ($ADMIN->fulltree) {
     $default = '#E3DFD4';
     $previewconfig = array('selector'=>'#page-content, #page-content #region-pre, #page-content #region-post-box', 'style'=>'backgroundColor');
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Right column colour setting
@@ -119,6 +131,7 @@ if ($ADMIN->fulltree) {
     $default = '';
     $previewconfig = array('selector'=>'#page-content #region-post-box, #page-content #region-post', 'style'=>'backgroundColor');
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Foot note setting
@@ -127,6 +140,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('footnotedesc', 'theme_formal_white');
     $default = '';
     $setting = new admin_setting_confightmleditor($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -135,5 +149,6 @@ if ($ADMIN->fulltree) {
     $description = get_string('customcssdesc', 'theme_formal_white');
     $default = '';
     $setting = new admin_setting_configtextarea($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 }
diff --git a/theme/fusion/settings.php b/theme/fusion/settings.php
index d96a89fa28e..ef5b9711d34 100644
--- a/theme/fusion/settings.php
+++ b/theme/fusion/settings.php
@@ -11,6 +11,7 @@ if ($ADMIN->fulltree) {
     $default = '#2d83d5';
     $previewconfig = NULL;
     $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Tag line setting
@@ -18,6 +19,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('tagline','theme_fusion');
     $description = get_string('taglinedesc', 'theme_fusion');
     $setting = new admin_setting_configtext($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Foot note setting
@@ -25,6 +27,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('footertext','theme_fusion');
     $description = get_string('footertextdesc', 'theme_fusion');
     $setting = new admin_setting_confightmleditor($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -32,6 +35,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('customcss','theme_fusion');
     $description = get_string('customcssdesc', 'theme_fusion');
     $setting = new admin_setting_configtextarea($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
 }
diff --git a/theme/magazine/settings.php b/theme/magazine/settings.php
index 4694af9d233..0c55fba2e45 100644
--- a/theme/magazine/settings.php
+++ b/theme/magazine/settings.php
@@ -9,6 +9,7 @@ if ($ADMIN->fulltree) {
 	$title = get_string('background','theme_magazine');
 	$description = get_string('backgrounddesc', 'theme_magazine');
 	$setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// logo image setting
@@ -16,6 +17,7 @@ if ($ADMIN->fulltree) {
 	$title = get_string('logo','theme_magazine');
 	$description = get_string('logodesc', 'theme_magazine');
 	$setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// link color setting
@@ -25,6 +27,7 @@ if ($ADMIN->fulltree) {
 	$default = '#32529a';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// link hover color setting
@@ -34,6 +37,7 @@ if ($ADMIN->fulltree) {
 	$default = '#4e2300';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// main color setting
@@ -43,6 +47,7 @@ if ($ADMIN->fulltree) {
 	$default = '#002f2f';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// main color accent setting
@@ -52,6 +57,7 @@ if ($ADMIN->fulltree) {
 	$default = '#092323';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// heading color setting
@@ -61,6 +67,7 @@ if ($ADMIN->fulltree) {
 	$default = '#4e0000';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// block heading color setting
@@ -70,6 +77,7 @@ if ($ADMIN->fulltree) {
 	$default = '#002f2f';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// forum subject background color setting
@@ -79,6 +87,7 @@ if ($ADMIN->fulltree) {
 	$default = '#e6e2af';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 }
\ No newline at end of file
diff --git a/theme/mymobile/settings.php b/theme/mymobile/settings.php
index cb309406cc8..96fd4bd3aa4 100644
--- a/theme/mymobile/settings.php
+++ b/theme/mymobile/settings.php
@@ -42,12 +42,14 @@ if ($ADMIN->fulltree) {
         'grey' => get_string('grey', 'theme_mymobile')
     );
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_mymobile/showmobileintro';
     $title = get_string('showmobileintro','theme_mymobile');
     $description = get_string('showmobileintro_desc', 'theme_mymobile');
     $setting = new admin_setting_confightmleditor($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_mymobile/showsitetopic';
@@ -56,6 +58,7 @@ if ($ADMIN->fulltree) {
     $default = 'topicshow';
     $choices = array('topicshow' => $yesstr, 'topicnoshow' => $nostr);
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_mymobile/showfullsizeimages';
@@ -64,6 +67,7 @@ if ($ADMIN->fulltree) {
     $default = 'ithumb';
     $choices = array('ithumb' => $nostr, 'ithumbno' => $yesstr);
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_mymobile/usetableview';
@@ -72,6 +76,7 @@ if ($ADMIN->fulltree) {
     $default = 'tabshow';
     $choices = array('tabshow' => $yesstr, 'tabnoshow' => $nostr);
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_mymobile/customcss';
@@ -79,6 +84,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('customcssdesc', 'theme_mymobile');
     $default = '';
     $setting = new admin_setting_configtextarea($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     unset($yesstr);
diff --git a/theme/nimble/settings.php b/theme/nimble/settings.php
index d6f21863fcf..098d6bd406b 100644
--- a/theme/nimble/settings.php
+++ b/theme/nimble/settings.php
@@ -10,6 +10,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('tagline','theme_nimble');
     $description = get_string('taglinedesc', 'theme_nimble');
     $setting = new admin_setting_configtext($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
     
     // footerline setting
@@ -17,6 +18,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('footerline','theme_nimble');
     $description = get_string('footerlinedesc', 'theme_nimble');
     $setting = new admin_setting_configtext($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
 
@@ -27,6 +29,7 @@ if ($ADMIN->fulltree) {
 	$default = '#454545';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// link color setting
@@ -36,6 +39,7 @@ if ($ADMIN->fulltree) {
 	$default = '#2a65b1';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 	// link hover color setting
@@ -45,6 +49,7 @@ if ($ADMIN->fulltree) {
 	$default = '#222222';
 	$previewconfig = NULL;
 	$setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+    $setting->set_updatedcallback('theme_reset_all_caches');
 	$settings->add($setting);
 
 
diff --git a/theme/nonzero/settings.php b/theme/nonzero/settings.php
index 6e201ae9a50..8ba71c1c8fb 100644
--- a/theme/nonzero/settings.php
+++ b/theme/nonzero/settings.php
@@ -38,6 +38,7 @@ if ($ADMIN->fulltree) {
     $default = 200;
     $choices = array(180=>'180px', 190=>'190px', 200=>'200px', 210=>'210px', 220=>'220px', 230=>'230px', 240=>'240px', 250=>'250px', 260=>'260px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block region-post width
@@ -47,6 +48,7 @@ if ($ADMIN->fulltree) {
     $default = 200;
     $choices = array(180=>'180px', 190=>'190px', 200=>'200px', 210=>'210px', 220=>'220px', 230=>'230px', 240=>'240px', 250=>'250px', 260=>'260px');
     $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -54,5 +56,6 @@ if ($ADMIN->fulltree) {
     $title = get_string('customcss','theme_nonzero');
     $description = get_string('customcssdesc', 'theme_nonzero');
     $setting = new admin_setting_configtextarea($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 }
\ No newline at end of file
diff --git a/theme/overlay/settings.php b/theme/overlay/settings.php
index a488100ef05..6c73fc8273c 100644
--- a/theme/overlay/settings.php
+++ b/theme/overlay/settings.php
@@ -12,6 +12,7 @@ $description = get_string('linkcolordesc', 'theme_overlay');
 $default = '#428ab5';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 
@@ -22,6 +23,7 @@ $description = get_string('headercolordesc', 'theme_overlay');
 $default = '#2a4c7b';
 $previewconfig = NULL;
 $setting = new admin_setting_configcolourpicker($name, $title, $description, $default, $previewconfig);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // Foot note setting
@@ -29,6 +31,7 @@ $name = 'theme_overlay/footertext';
 $title = get_string('footertext','theme_overlay');
 $description = get_string('footertextdesc', 'theme_overlay');
 $setting = new admin_setting_confightmleditor($name, $title, $description, '');
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 // Custom CSS file
@@ -36,6 +39,7 @@ $name = 'theme_overlay/customcss';
 $title = get_string('customcss','theme_overlay');
 $description = get_string('customcssdesc', 'theme_overlay');
 $setting = new admin_setting_configtextarea($name, $title, $description, '');
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
 
 }
\ No newline at end of file
diff --git a/theme/simple/settings.php b/theme/simple/settings.php
index 30f4e2bd132..dc72f72b0e5 100644
--- a/theme/simple/settings.php
+++ b/theme/simple/settings.php
@@ -37,6 +37,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('invert', 'theme_simple');
     $description = get_string('invertdesc', 'theme_simple');
     $setting = new admin_setting_configcheckbox($name, $title, $description, 0);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Logo file setting.
@@ -53,6 +54,7 @@ if ($ADMIN->fulltree) {
     $description = get_string('customcssdesc', 'theme_simple');
     $default = '';
     $setting = new admin_setting_configtextarea($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Footnote setting.
@@ -61,5 +63,6 @@ if ($ADMIN->fulltree) {
     $description = get_string('footnotedesc', 'theme_simple');
     $default = '';
     $setting = new admin_setting_confightmleditor($name, $title, $description, $default);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 }
diff --git a/theme/sky_high/settings.php b/theme/sky_high/settings.php
index c89db1b538a..6427f53e1aa 100644
--- a/theme/sky_high/settings.php
+++ b/theme/sky_high/settings.php
@@ -13,6 +13,7 @@ $name = 'theme_sky_high/logo';
 $title = get_string('logo','theme_sky_high');
 $description = get_string('logodesc', 'theme_sky_high');
 $setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
  
 // Block region width
@@ -22,6 +23,7 @@ $description = get_string('regionwidthdesc', 'theme_sky_high');
 $default = 240;
 $choices = array(200=>'200px', 240=>'240px', 290=>'290px', 350=>'350px', 420=>'420px');
 $setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
  
 // Foot note setting
@@ -29,6 +31,7 @@ $name = 'theme_sky_high/footnote';
 $title = get_string('footnote','theme_sky_high');
 $description = get_string('footnotedesc', 'theme_sky_high');
 $setting = new admin_setting_confightmleditor($name, $title, $description, '');
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
  
 // Custom CSS file
@@ -36,6 +39,7 @@ $name = 'theme_sky_high/customcss';
 $title = get_string('customcss','theme_sky_high');
 $description = get_string('customcssdesc', 'theme_sky_high');
 $setting = new admin_setting_configtextarea($name, $title, $description, '');
+$setting->set_updatedcallback('theme_reset_all_caches');
 $settings->add($setting);
  
 // Add our page to the structure of the admin tree
diff --git a/theme/splash/settings.php b/theme/splash/settings.php
index 66c543e279c..6a60dfcdee4 100644
--- a/theme/splash/settings.php
+++ b/theme/splash/settings.php
@@ -31,6 +31,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('logo', 'theme_splash');
     $description = get_string('logodesc', 'theme_splash');
     $setting = new admin_setting_configtext($name, $title, $description, '', PARAM_URL);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Tagline setting
@@ -38,12 +39,14 @@ if ($ADMIN->fulltree) {
     $title = get_string('tagline', 'theme_splash');
     $description = get_string('taglinedesc', 'theme_splash');
     $setting = new admin_setting_configtextarea($name, $title, $description, get_string('defaulttagline', 'theme_splash'));
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     $name = 'theme_splash/hide_tagline';
     $title = get_string('hide_tagline', 'theme_splash');
     $description = get_string('hide_taglinedesc', 'theme_splash');
     $setting = new admin_setting_configcheckbox($name, $title, $description, 0);
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Block region width
@@ -53,6 +56,7 @@ if ($ADMIN->fulltree) {
     //$default = 240;
     //$choices = array(200=>'200px', 240=>'240px', 290=>'290px', 350=>'350px', 420=>'420px');
     //$setting = new admin_setting_configselect($name, $title, $description, $default, $choices);
+    //$setting->set_updatedcallback('theme_reset_all_caches');
     //$temp->add($setting);
 
     // Foot note setting
@@ -60,6 +64,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('footnote', 'theme_splash');
     $description = get_string('footnotedesc', 'theme_splash');
     $setting = new admin_setting_confightmleditor($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
     // Custom CSS file
@@ -67,6 +72,7 @@ if ($ADMIN->fulltree) {
     $title = get_string('customcss', 'theme_splash');
     $description = get_string('customcssdesc', 'theme_splash');
     $setting = new admin_setting_configtextarea($name, $title, $description, '');
+    $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
 }