Napr. http://qt-project.org/forums/viewthread/15666 resp. tam prva odpoved link na http://qt-project.org/wiki/Build_Standalone_Qt_App lication_for_Windows
je toho plne QT forum (a neni to vec QT ale vec vseobecna, nech programujes v comkolvek).
A BTW. zapni si release build, ne debug.