http://bugs.winehq.org/show_bug.cgi?id=18452
--- Comment #12 from Carlos Laviola carlos@laviola.org 2009-07-09 14:43:26 --- I'm still experiencing the crashes, but clearing out the cache dir really helped. So far it seems like it is restricted to Dalaran right now, but more testing is needed.
The weird thing is that I only have 2 gigs of RAM + 512 Mb of VRAM, so in theory I'm not being affected by the 4 gig limit.