I'm having the same problem. Using 3.0 Beta build 25234. The trick may be to stop the torrent, delete the partfile, and force re-check (see below). The error is definitely caused by deselecting one or more files in the pre-download dialog or setting the Priority to "Skip" (instead of High/Normal/Low) in the Files tab during download. Skipping even small files (like the "Torrent downloaded from _____.txt" files in most torrents) can cause this error. The issue isn't new, it was supposedly fixed once. This must be a regression. The issue is discussed in an old thread (from 2006) on this forum. Quoted below is the fix that Greg Hazel supplied at the bottom of that thread: As the changelog says, old partfiles are corrupt. Please stop the torrent, delete the partfile, and force-recheck.
