If you run fullscreen Wine games or apps and the Unity panel and launcher show up on top of the game/app in some cases, here's a simple fix you can use.

Blizzard's Battle.net tool was updated recently, probably in preparation for the upcoming WoW expansion called Warlords of Draenor, resulting in either a black screen or distorted / scrambled graphics on Linux (with Wine) with Intel graphics.

It looks like this is not a Wine or Battle.net bug but an Intel graphic drivers bug, at least that's what the Wine developers suggest.

Installing World of Warcraft (WoW) in Ubuntu or Linux Mint (with Wine) is pretty easy, however there are various crashes that can occur, especially if you're not using the latest Wine and also, the FPS can be pretty low without a few tweaks, so I though I'd document everything I did to get World of Warcraft to work properly on my laptop (Nvidia Optimus, so I was able to test the game with both Nvidia and Intel graphics), even in large scale PvPs and hopefully, this will help you play WoW under Ubuntu or Linux Mint.