[Diggory Laycock]

Hello,

I've got a very odd bug in my install of Lion - it's not in every copy of Lion, just mine it seems.

Here's what happens: certain kinds of window - e.g. the OCR utility panel in DEVONthink Pro Office or the Activity panel in Mail.app remain on-screen when the app is hidden.

There is one exception - if the app in question is hidden by using the 'hide appName' menu item in the app menu (or it's Command-H keyboard shortcut.)

See a demo here: Lion utility window odd behaviour - YouTube

Can anyone think of a way that I can diagnose this bug, or better yet eradicate it?

Any help appreciated.

[Diggory Laycock]

After some more investigation I have discovered that the bug only affects instances of NSPanel which have their 'hide on deactivated' attribute disabled.

Can anyone think of a way that I can reset WindowServer to the state it should be in just after a fresh install? I.e. does it keep some data/preferences somewhere on the filesystem that I can trash?