http://bugs.winehq.org/show_bug.cgi?id=25745
--- Comment #9 from Vincas Miliūnas vincas.miliunas@gmail.com 2011-07-09 14:24:34 CDT --- (In reply to comment #8)
Do you launch the game with this command?
env WINE_CURSOR=X wine WorldOfTanks.exe
When the problem was present I tried a few variants, including the one you gave (they are listed in the AppDB page), but at that time it did not help me.
The bug as described in the title is no longer present and was fixed by the game developers; I suggest to mark it as invalid or worksforsome, unless somebody will research the older version I linked earlier.