I downloaded f13 alpha x86_64 dvd via bittorrent a few days ago, and just now got around to verifying the sig (it was OK) and doing the sha256sum -c check of the checksum.
The checksum check failed :-(.
I've removed it, and I'm trying again, but just wondered if anyone else had this problem? I thought bittorrent was checksumming chunks as it goes and this sort of thing shouldn't happen.