I'm not an expert but one other thing you could try is to build the app from the Qt command prompt - at least that will give you a 'clean' environment and path.
There are these weird spaces in the path and also in the build log - is it a non-english OS (although that shouldn't matter).
I also noticed visual studio 8 is in the path. I would put all Qt related entries at the front of the path, not at the end. Of course this won't matter if you build from the Qt command prompt.