http://bugs.winehq.org/show_bug.cgi?id=4803
--- Comment #12 from Dan Kegel dank@kegel.com 2008-03-23 20:47:29 --- My bad. To use a noninstalled wineshelllink, you have to start the installer with PATH=$HOME/wine-git/tools:$PATH wine-git/wine installers/BLMInstall277.exe and then the icons are fine, since it's using the new code in the build tree.
Oddly, the link and shortcut on the desktop don't use any of the icons, but the ones in the Wine menu look good.