If you are playing World of Warcraft on a Debian or Ubuntu system with newest Wine packages from WineHQ, then you might run into a problem - WoW-2.1.2.6803-to-2.1.3.6898-enUS-patch.exe files will crash on Wine 0.9.40 with some nastygrams sent in the direction of its mshtml implementation. Downgrade to 0.9.33 (like the version in feisty) and the patching will work just fine.