The MD5SUMS file for the 20120901 dump includes filenames of the format
*/tmp/mbscript-8wCf1rH1/mbdump-cover-art-archive.tar.bz2
mbdump-cover-art-archive.tar.bz2
Additionally, the MD5SUMS file lists a sum for mbdump-private.tar.bz2, which is obviously not provided as part of the dump.
In review at http://codereview.musicbrainz.org/r/2246/
Shipped to the beta branch, but as there's nothing to test I'm closing this.
In review at http://codereview.musicbrainz.org/r/2246/