Try deleting the cookies for the site and clearing the cache, this can sometimes help with this sort of problem. For details see [[deleting cookies]] and [[how to clear the cache]]. As an aside, you mention that you have the latest non-beta version, which should be 3.6.9, but your user agent is showing that you have 3.0.11. Try resetting your user agent by following the method in the [[websites or add-ons incorrectly report incompatible browser]] article. In your case as the complete user agent string is for 3.0.11, you may need to reset the preference general.useragent.override as shown in that article.