I'm running iTunes 7.5 on OS X 10.5.1. Periodically, iTunes will not close right away with either the keyboard shortcut or from the iTunes-Quit iTunes menu.
When I use either method, sometimes I have to click on the window somewhere to get it to actually close. iTunes is still running, as anything I have playing keeps playing until I click in the window again.
If iTunes is hidden but active, a right-click on the icon to close it will not "go" until I click on the icon again, the window will appear then finish closing.
Has anybody else experienced this? I'm thinking about trying a reinstall of iTunes.