Bad use of language; I know it's all C++ under. It's just that I'm was concerned about what I heard and wasn't sure if there were any classes that Trolltech made un-inheritable or if they simply disallow inheritance for specific classes. Good to know that's not the case.

As for debugging, mostly I mean like it works on Windows XP say, but then some weird behaviour pops up as I run it on Ubuntu or OSX. Happens on Java, but that might be because I have to compile it on different platforms itself and their compiler's aren't exactly the same.