[Wine] Frequent "Out of memory" issues with DX9 games under Gentoo

[Das Letzte Einhorn]

Since I switched to Gentoo Linux, I have had multiple issues of DX9 games crashing after about 15-20 minutes of playing because of "out of memory" issues. I do not recall having so many problems with that when I was running Wine under Ubuntu.

My config:
Q6600
4 GB Ram
Nvidia 8800GT
Gentoo X64
Latest wine-git as of Feb 8 2009

I have reported one of them as a bug:

http://bugs.winehq.org/show_bug.cgi?id=17140

but after trying some other games (the Witcher and Dark Messiah of might and magic for example) and seeing that it seems recurrent, I am wondering if something is wrong with my configuration and I would like to have some input from you guys. I have also read this : http://wiki.jswindle.com/index.php/Debugging_Wine#Out_of_Memory , but since I am not a developer I am not sure how to "cure" my wine installation. 

Here is a tailed console output for Dark messiah of MM, if it can be useful anyhow: http://pastebin.ca/1331335 . If you have any suggestions of things to try / test / report, please tell me.

Thanks!