https://bugs.winehq.org/show_bug.cgi?id=37189
--- Comment #4 from Yclept Nemo orbisvicis@gmail.com --- Thanks, with msvcp71 overridden to native, irrespective of msvcr71 or msvcrt, the game will work. That is to say, I can get past the autoupdater. I haven't tested the game itself.
I am using wine 1.7.25, as provided by WineHQ's ubuntu PPA (all the details are linked in the forums).
For the record, the client is opensource. The original code is at https://foundry.openuru.org/hg/CWE-ou, while the updated client is at https://github.com/H-uru/Plasma. Unfortunately neither have been updated to work under linux.