If you want to "fix" that without rebooting your computer you should
check this hint out.
That bug's been around for so long in Tiger that I've given up hope on it being fixed with an update (along with the numerous Bluetooth bugs and the "better not forget to eject your Windows network shares" feature). I've reached the point where if they can just promise to sort this kind of stuff out with Leopard, they wouldn't even have to add any new features and I'd be sold!
🙂