I think it'd be a good idea to change that "no such file in db" on sizematch (back) to a note that there has been no hash-, but rather that size-match, maybe with a "possible corruption"-remark
More commands for that would make it more confusing for beginners... and one better gets to know that it is a possibly corrupted file without having to perform an additional (!ckhash) action.
It could return a list like "Size-match on: (1) [AnimeName] [Ep-Nr] [group] ([fid]), (2) [AnimeName] ..."
Now, to add the "special use", the files returned could be color-coded like in the web-interface, meaning that they're (light) green, grey or (light) red, so it would be even easier to identify actual corruptions.
[Chii] Show size-only-matches w !file and !addfile [TRACKED]
Moderator: AniDB