In researching bug 456895 it is likely that GetShortPathNameW is failing in some cases here http://mxr.mozilla.org/comm-central/source/suite/shell/src/nsWindowsShellService.cpp#396 This was added so users that had a shortpath from prior versions when upgrading would not be asked to set SeaMonkey as default after the upgrade. I recommend removing this code.
btw: bug 476106 fixes a similar bug for all installers / uninstallers.
Created attachment 360868 [details] [diff] [review] patch rev1
reassigning to default since other work is calling
8 years ago
mcsmurf, do we still need to move forward on this?
Frank, are you still working on this?
> Frank, are you still working on this? Frank, are you still working on this? Ping!
It's on my radar, will work on this.