http://bugs.winehq.org/show_bug.cgi?id=23667
--- Comment #5 from A Wine user RandomAccountName@mail.com 2010-07-16 10:32:50 --- Created an attachment (id=29631) --> (http://bugs.winehq.org/attachment.cgi?id=29631) +menubuilder log
I see the problem using either self-compiled Wine or the package from the Ubuntu PPA. (I'm using Kubuntu 9.10 x64.) libpng is present, and I think it's usable...
Here's the +menubuilder trace, hope it has something helpful.
On another note, I'm usually running this installer from another partition (FAT32). On a hunch, I tried running it from ~/.wine/drive_c instead, and for some reason, this seems to make it work most of the time. I still get a wine glass 15-30% of the time. (Or I guess it could just be an inconsistent problem and I got lucky after I moved the file...)