i'm also getting the menu bar error in 10.2 but i haven't had too much time to play since getting the patch, so i didn't mention it earlier. but like paul said, cmd-tab, and dock cause the error. i have another way: i have two monitors set up, but carrara is only configured for one. i can then click in the other monitor to access the desktop. (if i hold option while clicking, it hides carrara.) but when i come back to carrara, i get the white osx menu bar over top. (one neat thing about the dual monitor setup i have is that i can use the process viewer and cpu monitor to see how many resources carrara is consuming.) in respect to pauls comment that it isn't the os, i have to say that i haven't seen this kind of error in any other program running natively or in classic, for that matter. but then in respect to charles, i don't run any other programs that replace the desktop and menu bar with customized UI like carrara does. so i don't see how the os can be ruled out yet. on a side note, i just wanted to share with you mac heads that work has finally upgraded our machines to the dual 1ghz with 167mhz bus. and the other night i rendered my kitchen donut scene at 3840x2400 (twice hd res) in the background in under a half hour... while i was burning a cd at 16x. i just thought that was pretty cool. on tuesday i'm going to try rendering my personal carrara stuff in the background while i use photoshop for work. work is so much more exciting all of a sudden. -scott