I do not have any of those files, but I have /home/user/.thumbnails occupying 574MB. I'm running out of inodes, although I still have free space. What's on that folder?

Edit: well, mine had 105 thousand files, of which 104 thousand were on the "grid" subfolder and seemed to have all the square thumbnails of all "gallery"-type panes of all apps - Gallery, Facebook albums, Music cover art, etc. I'm nuking it as we speak, but there's so many files that "rm folder" or "rm *.jpeg" is not working, nor does the usual "find . -exec" trick work.