- 
    Bug 
- 
    Resolution: Done
- 
    P1: Critical 
- 
    Qt Creator 3.1.0-beta
- 
    Windows 7 64 bit, OS X 10.9
 Qt 5.2.1, Qt 5.3
- 
        924e54b448468c9c036f6155893fa3373f4f2258
- Open a UI file in Creator's integrated Widget Designer.
- Try to drag and drop a Widget, e.g. a QButton, onto the window.
 You can't drop it there.
With Creator 3.0, built on the very same version of Qt, this works fine.