Today I stumbled over two checksum errors:
opera10-locale.tcz.md5.txt was probably not updated after a change to opera10-locale.tcz.
hal-dev.tcz.md5.txt is actually an edited version of hal-dev.tcz.info (and contains no checksum at all). It appears to me that hal-dev.tcz.md5.txt formatting looks "better" than hal-dev.tcz.info and should probably be used in it's place.