http://bugs.winehq.org/show_bug.cgi?id=30115
--- Comment #5 from Alexey Loukianov mooroon2@mail.ru 2012-03-09 12:34:54 CST --- Created attachment 39274 --> http://bugs.winehq.org/attachment.cgi?id=39274 Patch that fixes software partial plain blits for compressed surfaces.
Yeah, thanks for pointing on this, it is actually the bug cause here. Here is patch that fixes the issue written against wine-1.4. It's pretty straightforward and I hadn't checked it for possible arithmetic overflows, but at least it works and fixes rendering issues in PW game client.