Delete Airdisplay, iScreen, etc to solve drag and drop, white screen, etc issues

Deleting the screensharing program (in my case iscreen, guess airdisplay, etc are the same) did solve all my issues -- as mentioned before drag and drop did not work, white screen in several programs, not menu bar in full screen, etc.

Lion is now running smoothly - so everybody having the same issue just delete airdisplay and co :-))))))