http://bugs.winehq.org/show_bug.cgi?id=7211
--- Comment #9 from Pierre Bourdon delroth@gmail.com 2008-04-19 23:06:06 --- I think I finally found a fix for this bug : the problem was that we are all 64 bit users, and our linux distribution install the mesa i686 libGL. I solved the problem with Guild Wars by installing the 32 bits libs made for my graphics card (on archlinux, lib32-nvidia-utils), Guild Wars works perfectly, no more bugs.
It also solved the dual-TMU bug I got with World of Warcraft, so these two bugs were surely linked.
Moreover, it fixes a bug I was getting, which made the game bug with the message « Assertion `image_bytes <= ((4 * reply.length) - 0)' failed » ;) . Installing the right libGL may solve a lot of 64 bits related bugs. Now, it's 6AM, going to sleep.