I was moving a pile of MP3s from my Music folder to an external HDD (it is fat32, if that matters), when I realized that I should not have selected "apply to all" when I told it to "Overwrite" for one of the files. There was one directory in particular that wanted merged. So I cancelled the move.
About half of the files had already moved when I did this.
Now I am trying to move the rest of the files, but am running into weird "file already exists" problems. As in: I try to move a file to the target directory and no matter what I do, it will not allow me, saying that the file exists in the target directory. My only option is to "skip" or "cancel". Of course the file does not appear in any directory listing of the target directory. I have dozens of files and folders now that I am unable to move because of this weird phenomenon.
I suspect that when I cancelled the mass-move that something got screwed up, but now I don't know how to recover and I cannot seem to phrase this question well enough to get google to find me a solution.