http://bugs.winehq.org/show_bug.cgi?id=22031
--- Comment #8 from rocko rockorequin@hotmail.com 2010-05-18 22:14:37 --- I did some more testing and found that I get no sound with *any* version of wine (I tried 1.1.30, 1.1.34, 1.1.35 and 1.1.44) if I am running in Ubuntu 10.04 (pulseaudio 1:0.9.22~0.9.21+stable-queue-32-g8478-0ubuntu14 and either kernels 2.6.32 or 2.6.34), but I get sound from the main title screen and onwards running wine 1.1.44 in Ubuntu 9.10 (pulseaudio 1:0.9.19-0ubuntu4.1 and kernel 2.6.31).
ie the problem for me seems to be the way wine is interacting with Ubuntu 10.04 rather than a particular regression.
On a possibly related note, I have intermittent sound issues when I run Call of Duty 4 in wine/Ubuntu 10.04 - sometimes there is no sound at all, although usually it works fine. If it fails to work, it fails right at the start.
Any hints on where to find the problem?