I have a MacBook Pro running 10.6.8. It has all the latest updates (except for an item each for iTunes and Safari). Having not used Mail for a week or so, I've run into some problems with it - plus similar problems with Colloquy and LimeChat (both IRC clients). For all three, the problem is that the screen is not being redrawn; it appears to be acting transparently, and so screen furniture (scrollbars etc) are leaving a trail where the application content should be.
I've tried an array of things to fix it - obviously tried rebooting, and also shutting down fully before turning back on.
Also, I've deleted ~/Library/Preferences/info.colloquy.plist, with no change in Colloquy's behaviour. To be honest I'd not expect it to be an individual application issue, since it is affecting these three applications.
I've tried a few graphics things too. I've turned off the energy saving graphics mode in the Energy Preferences pane (although it has worked since new with that feature enabled). I was also running gfxCardStatus, now removed from the boot sequence and not running.
I've tried removing most things from opening at login, again to no avail. I've tried a new user account, and the same problems are exhibited in LimeChat. Not yet tried Mail in the second account - will do so - but am not hopeful.
As a long shot, my colleague suggests that I try verifying my primary (only) disk, and this turns out to be fine (
verifying permissions as I type all disk permissions have been fixed, no change).
The last thing I installed was a modem driver, but it's been working fine with this, so I don't think it was that that has upset the system. Not sure I've done anything differently that might have caused this, tbh. So... I am now a bit stuck. Any ideas?
Edit: just tried Adium as well, another chat client. Same redraw problems again!