We're not entirely sure what the bug fix patch does right now, but we're looking into it and will update this post shortly. Hopefully it fixes at least a few of the problems that have come along with The Fall of the Lich King last Tuesday. If you notice in the image above a link to patch notes, well, that link doesn't work. Apparently something was or will be there, but no such luck right now.
This patch brings the game from version 188.8.131.5258 to 184.108.40.20659. The patch file is about five megs in size.
Patch 3.3 is the last major patch of Wrath of the Lich King. With the new Icecrown Citadel 5-man dungeons and 10/25-man raid arriving soon, patch 3.3 will deal the final blow to Arthas. WoW.com's Guide to Patch 3.3 will keep you updated with all the latest patch news.