Another security release just announced today Firefox 2.0.0.9, to make a total of two releases in two weeks. The new release have been announced just four days after the 2.0.0.8 release on Mozilla Developer Center. The bugs concerned in this release :

• Bug 400406 - Firefox will ignore the "clear" CSS property when used beneath a box that is using the "float" property. There is a temporary workaround JS/CSS code available for web developers with affected layouts.
• Bug 400467 - Windows Vista users will get "Java not found" or "Java not working" errors when trying to load Java applets after updating. To fix this, users can right-click the Firefox icon and "Run as administrator", then browse to a page with a Java applet — doing this once will fix the problem and permanently restore Java functionality.
• Bug 396695 - Add-ons are disabled after updating. Users can fix this problem by opening their profile folder and removing three files (extensions.rdf, extensions.ini and extensions.cache)
• Bug 400421 - Removing a single area element from an image map will cause the entire map to disappear. There is no workaround available at this time.
• Bug 400735 - Some Windows users may experience crashes at startup. There is no workaround available at this time.