I can reproduce the following problem.If I click 'create databinding' you can see the databinding screen flash for a split second, but It disappears. The blend application itself is waiting for input to be able to continue. If you click on any-part of blend you here a 'bling' sound. Push escape and you again can work in blend (which actually closes the disappeared screen).This only happens when you have a two screen setup and you have configured that the desktop should be shown on screen 2 and that the deskopt should be extended.Setting to display the desktop on monitor 1 and extend, and the problem does not occur.
Repro Steps? (N/A for Suggestion)