Old versions of the algorithm exhibit some issues (which is why they were replaced).
The v0 exhibits the following issues:
- (2012-03-05) V0 incorrectly performed host-endian math with bytes translated into 16-bit network-endian.
- (2012-07-17) V1 incorrectly sized site name fields by character count rather than byte count.
- (2014-09-24) V2 incorrectly sized user name fields by character count rather than byte count.
Presumably the host-endian'ness could be causing the issue.