Hi, I have a number of customised silverlight user controls that contain icons and that i can drag around the browser screen just like in Windows. But when I have a few windows open, dragging and any kind of small animation drops to 2 frames per second. CPU is more than 25% on a core 2 Quad 2.4GHz. I've turned GPU acceleration on and made sure every control has Bitmapcache mode enabled. It really is as if all screen drawing is done in software and none at all in hardware. I also have windows opening that should be animated but simply appear after .5 seconds due to this issue. Is this normal behaviour for SL4 (VS2010) or is there something I can do to improve this. I recently installed a Gigabyte HD 6970 but no improvement. Surely in this day and age of this standard of video card the fps should be well into the 30's and even close to the SL default of 60?