When I link with the Release build of JUCE, I get native window decoration around the window (Gnome title bar and buttons), but when I build with the Debug version of the library, it works like I’d expect it to: no window decoration.
Is the debug build doing something different than the release build? IE… trying to be helpful and fixing programmer errors?
Edit: I’m running Ubuntu Gutsy amd64. I don’t think that matters, but it couldn’t hurt.