Although minor GEM updates prior to the Wrath of the Lich King expansion didn't seem to matter much in most cases, we are aware recently of an unfortunate problem with people not seeing events in GEM even if they were only one version behind. This led to many people not being aware of the sign-up list for the temporary Naxxaramus runs to expose more people to Naxxaramus.

I endeavour to keep the copy on the THB GEM page updated with the latest version, but sometimes I get behind. Your GEM will notify you when a new version is available from the official web site (http://www.wowgem.fr/index.php) or you can use a third-party extension manager such as WoWMatrix which will allows you to download and install updates easily for add-ons it supports. Its available for Windows, Macintosh, and Linux.

The current version of GEM is 3.22. Make sure you have the latest version.