Qt 4.2.3 on Windows XP (SP2)

[macbeth]

Thanks, jacek.

It looks a bit different, because I am using Vista inspirat pack (one of those UI tweakers). The only thing I think could possibly cause the problem is a mixup of libraries compiled with MS Visual Studio compiler and mingw, but as far as I know, all the paths are set ok...

[jacek]

The only thing I think could possibly cause the problem is a mixup of libraries compiled with MS Visual Studio compiler and mingw, but as far as I know, all the paths are set ok...

Could be. Does it look OK if you start the mdi example from "Qt 4.2.3 Command Prompt"?

I've just checked it on my system and it seems to work fine.

[macbeth]

Yes, I've already tried that. It looks like the screen I linked in the first post. Hm... maybe I try to turn off these UI tweaks and recompile Qt with mingw after removing the one compiled with visual studio... I'll let you know if that helps...

[jacek]

recompile Qt with mingw after removing the one compiled with visual studio...

You can use Dependency Walker to see which DLLs it tries to use.