I'm trying to find a solution to an issue a family member it having with Yahoo Messenger and an iMac. The computer is an early release aluminum iMac, running Mac OS X Tiger 10.4.11. Yahoo Messenger is the most current version installed. A transparent image of the Messenger icon is on the dock and seems to be stuck between the dock's line near the trash can. It won't delete, even deleted the normal version of Messenger, shut down the computer and restarted it. The image was still on the dock. Are there Messenger files in other folders, that somehow didn't get deleted when the application was deleted, causing this? I've never seen an issue like this before, so any help would be appreciated.