I thought the exposé bug had been fixed quite some while ago? Well I am seeing it again. Is it a regression, or what? I am talking about ticket #78 http://trac.macosforge.org/projects/xquartz/ticket/78 which is closed, with resolution: duplicate. Here I must digress and report a bug in the bug tracking system: It doesn't tell you what bug report it is a duplicate of! It should not be possible to close a bug with resolution: duplicate without specifying this vital information, and without that information being visible afterwards. However, I am unable to find it after quite a bit of looking. Anyway, ticket #78 describes exactly what I am seeing, so I won't repeat it here. Xquartz-1.4.0-apple7, X11 2.2.1-rc2 (said to be identical to 2.2.1, so I haven't upgraded), and Ben's quartz-wm. - Harald