Some of my downloaded fansubs arent listed in my AniDB profile.
But the files do exist.
Example:
Kindaichi Shounen no Jikenbo from Studio Tomo... I downloaded it and after watching, added it (along with others) with AniDB O'Matic 0.56x but its listed as 'File Unknown' in the proggie.
I checked the stats of my file and the info online and they are exactly the same till the last byte.