Fixing a bug, see http://moodle.org/mod/forum/discuss.php?d=37545

Instead of grabbing variables defined by the course format with
global $var; the block now recomputes them itself.

Of course this also introduces a (significant?) performance hit.

I think it's much preferable to "live with" the hit until a good
solution is developed rather than have a hacky solution that could
break anytime for any obscure reason (case in point). Objections?

blocks/activity_modules/block_activity_modules.php

@@ -3,14 +3,13 @@
 class block_activity_modules extends block_list {
     function init() {
         $this->title = get_string('activities');
-        $this->version = 2004041000;
+        $this->version = 2006011300;
     }
 
     function get_content() {
         global $USER, $CFG;
 
-        // This is really NOT pretty, but let's do it simple for now...
-        global $modnamesused, $modnamesplural;
+        get_all_mods($this->instance->pageid, $mods, $modnames, $modnamesplural, $modnamesused);
 
         if($this->content !== NULL) {
             return $this->content;