Bizarre problem.
I'd downloaded a bunch of Mac Boot Image files from ResExcellence, and I unstuffed them to folders. I had about 15 on my desktop, so I highlighted them and began to drag them over to a subfolder in my "Documents" folder, but my finger slipped off the mouse; so what happened, effectively, was that I'd dragged them over an inch and dropped them back onto the desktop. The thing, I guess, is that there were all the original sit files on the desktop as well, and some of the folders I dropped I dropped onto these original files. I heard my processor kick up and start to crunch something full blast, and for about fifteen seconds I couldn't do anything, even thought I maintained control of my cursor. When it was done doing whatever it was doing, my "Documents" folder was highlighted in my dock. Also, and what's more bizarre, I couldn't drag anything anymore. I could copy files, and I could move them to the trash, but I couldn't drag them with my cursor. I rebooted my computer, but the "Documents" folder is still permanently highlighted in my dock. I can drag files once again, but I don't understand why its highlighted, and I don't like what I don't understand when it pertains to my computer, you know?
What did I do? It seems innocuous, but I'd like to revert it to its default settings, if anyone knows how.
Thanks.