Since 10.7.2 I'm randomly getting graphic corruption on my external monitor (Dell 2711). It's connected to my '10 15" MBP by a minidisplayport - displayport cable. Color profile is apple RGB and resolution is 2560x1440. The MBP LCD is also on, making a multimonitor setup. Here: It only goes away with a restart, then it's fine. If I disconnect the external monitor, switch to integrated intel, and then connect the external monitor again, the problem persists. I never get corruption on the MBP screen, either with the integrated intel or with Nvidia 330M. It's annoying to have to do a restart every time this happens. I'm, pretty sure it's a software bug, I've never seen it with 10.7.1, anyone else is getting this? Thanks.