Comment 6 for bug 702452

I'm seeing this as well. My example app, that I'd like to sort out, is Picasa. I've added a StartupWMClass=Wine entry to the .desktop file I'm using to launch Picasa from the Unity Launcher, but it still doesn't match the resulting running Wine app. I wonder whether the solution that Docky implemented (see bug #596092) would help here?

In the case of Picasa, it actually bundles its own Wine runtime and xprop shows WM_CLASS of "Picasa3.exe" "Wine" - and the running binary is called Picasa3.exe

Integration of Wine apps in Unity is not great at the moment and it's fairly clear that the Wine folks are unlikely to make special efforts to help on the Unity side (see e.g. http://forum.winehq.org/viewtopic.php?p=60406) so the more that can be done in Ubuntu / Unity itself, the better. Little things like icon / window / application matching for the Launcher would go a long way as a starting point.