upgraded to LR 5. Hard Bug in the Diashow module. Full black screen ever and ever.... the Diashow module gets to black screen if I try to start the start button or the preview button. No run of the dia show. Exit by using ESC key is impossible. System is full blocked after starting the diashow module. It was an upgrade comming from LR 3. This version is running well. What is Adobe thinking to do to fix this bug. Please send instruction for fixing /improvement. Also the performance is getting down . This LR5 tool is not longer for professional use until the systems can perfom the workflow comparable to LR3/LR4 level, minimum . Grafik on board of my comuter is GTX20 (Gforce) Please send instruction how Adobe will fix this problem. What can I do ? Money back ?