I have a MBP 15" Unibody. I use the mini displayport to dvi outpout. I didn't have any issues until I installed the nVidia driver update. Then I started having issues with the cursor being jumpy while hooked up to an external display. If I'm just using the laptop w/o the external display it's just fine. It's kind of odd that the one problem it was suppose to resolve it actually caused in my case. Even though the release notes says it fixes an issue with the dual-dvi out and I only use the single. So the question is: Is it possible to uninstall an update or 'rollback' the display driver to the previous version? Because I had no problems before the update. I know they pulled the update and I suppose this explains why.