I've got a 1GB XFX 4870 that I flashed using the info from the exhaustive 4870 flashing thread. It's being used in my Mac Pro with a GT120 and I use 3 monitors. When using Aperture 3 the 2 displays that are attached to the 4870 exhibit graphical glitches when performing adjustments... The glitches range from a garbled mess of of the original image, to being able to see the previously viewed image very briefly. After I've performed one adjustment on the image the adjustments work as they should. The display with the GT120 performs fine with fairly smooth performance. This was not an issue with Aperture 2. Are there any other users of flashed 4870's and Aperture 3 seeing this issue? I thought that the card could the card be failing but it still gives stellar performance everywhere else including gaming in Windows 7.