I'm running OS 10.2.8 on a revision B iMac, 350 mHZ and 384 MB of RAM. I can't recall exactly when this started hapenning, but I have for some time now been unable to paste. I can copy, but when I attempt to paste it gives me the system alert sound and does nothing. I've used Disk Utility to verify and repair permissions, but I have a feeling there's a very simple solution that I'm missing. Help!