Tested with 9.0 beta4, linux, 3GHz Core2, Nvidia 260GTX.
I have played the single player campaign twice from the beginning to the end, without any troubles. All the online modes I tested work well too (survival, deathmatch, instakill, my burden, coin-op co-op, other modes I didn't test). Everything works better as compared to the 1st encounter and cxgames 8.1.4...
There are two minor issues with this game. Both are present in the 1st encounter as well (and same fixes work there too)...
1: sound does not work unless I set it from hardware to emulation (in winecfg).
2: The screen turns occasionally to all cyan. The fix is to use low settings for the GPU speed, or (better, if your hardware can handle this) use whatever settings you like (medium, high, ultra...) as a base setting, and then select custom, and just turn antialiasing off. No graphical glitches then...
Edit: I submitted a screenshot for this (Valley of the Jaguar), using high settings except antialiasing off.