diff --git a/lib/installlib.php b/lib/installlib.php
index d4f12dcefd6..e6f468f2a37 100644
--- a/lib/installlib.php
+++ b/lib/installlib.php
@@ -391,7 +391,7 @@ function install_print_footer($config, $reload=false) {
 
     $homelink  = '<div class="sitelink">'.
        '<a title="Moodle '. $CFG->target_release .'" href="http://docs.moodle.org/en/Administrator_documentation" onclick="this.target=\'_blank\'">'.
-       '<img style="width:100px;height:30px" src="pix/moodlelogo.gif" alt="moodlelogo" /></a></div>';
+       '<img src="pix/moodlelogo.png" alt="moodlelogo" /></a></div>';
 
     echo '</form></div>';
     echo '<div id="footer"><hr />'.$homelink.'</div>';
diff --git a/lib/outputrenderers.php b/lib/outputrenderers.php
index 343d379f471..cf1aaa9625b 100644
--- a/lib/outputrenderers.php
+++ b/lib/outputrenderers.php
@@ -698,13 +698,13 @@ class core_renderer extends renderer_base {
             // Special case for site home page - please do not remove
             return '<div class="sitelink">' .
                    '<a title="Moodle" href="http://moodle.org/">' .
-                   '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
+                   '<img src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
 
         } else if (!empty($CFG->target_release) && $CFG->target_release != $CFG->release) {
             // Special case for during install/upgrade.
             return '<div class="sitelink">'.
                    '<a title="Moodle" href="http://docs.moodle.org/en/Administrator_documentation" onclick="this.target=\'_blank\'">' .
-                   '<img style="width:100px;height:30px" src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
+                   '<img src="' . $this->pix_url('moodlelogo') . '" alt="moodlelogo" /></a></div>';
 
         } else if ($this->page->course->id == $SITE->id || strpos($this->page->pagetype, 'course-view') === 0) {
             return '<div class="homelink"><a href="' . $CFG->wwwroot . '/">' .
diff --git a/lib/tests/other/pdflibtestpage.php b/lib/tests/other/pdflibtestpage.php
index b24493848e0..8a0f8754e04 100644
--- a/lib/tests/other/pdflibtestpage.php
+++ b/lib/tests/other/pdflibtestpage.php
@@ -61,7 +61,7 @@ if ($getpdf) {
     $doc->setPrintHeader(true);
     $doc->setHeaderMargin(10);
     $doc->setHeaderFont(array($fontfamily, 'b', 10));
-    $doc->setHeaderData('pix/moodlelogo-med-white.gif', 40, $SITE->fullname, $CFG->wwwroot);
+    $doc->setHeaderData('pix/moodlelogo-med.png', 40, $SITE->fullname, $CFG->wwwroot);
 
     $doc->setPrintFooter(true);
     $doc->setFooterMargin(10);
diff --git a/pix/moodlelogo-med.png b/pix/moodlelogo-med.png
new file mode 100644
index 00000000000..efed023611d
Binary files /dev/null and b/pix/moodlelogo-med.png differ
diff --git a/pix/moodlelogo.png b/pix/moodlelogo.png
new file mode 100644
index 00000000000..8c3988c3905
Binary files /dev/null and b/pix/moodlelogo.png differ
diff --git a/theme/base/pix/favicon.ico b/theme/base/pix/favicon.ico
index 5a7a36a68e6..eea02482c37 100644
Binary files a/theme/base/pix/favicon.ico and b/theme/base/pix/favicon.ico differ