Although I'm very happy with my 2009 2.26 Ghz Mac Mini, I've experienced many strange things in the last two months. About two months ago all my animations (Exposé, stacks, the dock, spaces) became very sluggish and all my apps were likely to crash. I fixed it by repairing the disk permissions and changing all my icons and the background back to normal. In the period that followed my animations and performance became sluggish again in about every 2 weeks. So I did a lot of system maintenance task, like repairing disk permissions and a few things in Onyx, (Is doing this a lot bad for your system?) and deleted a lot of things I didn't need. It helped, but only for a little time. But a few hours ago the problems returned even worse and after a awful lot of maintenance tasks the problems did still occur. Is this my video card? Can I fix this? What do you recommend to do? Thanks in advantage. Btw my video card is a NVIDIA GeForce 9400 with 256 MB VRAM.