http://bugs.winehq.org/show_bug.cgi?id=19108
--- Comment #6 from Henri Verbeet hverbeet@gmail.com 2009-06-28 13:26:13 --- Actually, that looks like it could be a duplicate of bug 13335. Do the patches attached to that bug make any difference? Current git versions of Wine should have a bit more available address space as well.
That said, it's certainly possible pulseaudio is just leaking memory. Due to the more limited amount of memory available that would crash much sooner with Wine.