Mar 21 2009
Moodle: overLIB 4.10 or later is required for the CSS Style Plugin
I just ran into an obscure error on our Shibboleth-based implementation of Moodle; when accessing the site with Firefox 3/WinXP a user reported the following error:
“overLIB 4.10 or later is required for the CSS Style Plugin”
A little searching revealed that this is apparently a problem with the browser’s cache; clearing the cache causes it to go away. If you’re proxying Moodle, you may need to clear the proxy’s cache as well. There’s no Tracker item for it; I thought of adding one, but this isn’t really a Moodle problem — it’s a browser one.
- moodle.org: Overlib problem (moodle thread discussing the problem and fixes)
- octette.cs.man.ac.uk overLIB 4.10 or later is required for the CSS Style Plugin

Thank you! I was having the same problem, clearing the cache seems to have solved it.