^^ Can't find your video card here
Anyway, you may want to provide information like output of,
The obvious is that X run out of memory. The reason is most likely a memory leak.
I've experienced severe leaks in X resources in wine 1.1.x series until almost 1.2. For me X bloated to 2+G over a period of few hours. I suggest you upgrade to wine stable (version 1.2).
PS. This is not a high traffic part of the forum, like COAD or similar. Responses can take days and that is if someone knows what's going on