http://redump.org/discs/dumper/Piro_Maniak/

I noticed this one is "underdumped" http://redump.org/disc/51029/

Can we assume some of the others might be bad as well?

All my posts and submission data are released into Public Domain / CC0.

I checked the sizes of his other dumps and they are all correct. The underdumped one should match this new entry: http://redump.org/disc/56878/