Can't drag folder to desktop Since upgrading to Mountain Lion, every time I try to drag a folder to my desktop it only makes an alias. Is there any way to reenable moving regular folders? It's really obnoxious to have to make another directory every time I want to move something for a short while.
Try deleting the Finder preferences (rm ~/Library/Preferences/com.apple.Finder.plist)
Try to replicate the problem on another user account on the same Mac.
Look for utilities which change the keyboard behaviour.