Sync Icon on Toolbar

An icon on the toolbar apparently used for syncing to .mac won't go away and keeps popping up a window to say I have conflicts in my address book and iphone. I checked...info looks fine in both places. Yeah, doesn't make sense to me either. I don't have a .mac account. The only options under this icon are "sync now," which seemingly does nothing, and "open .mac sync preferences." Tried that...no option to turn this feature off.

Where do I go to turn this icon/feature off?