That also reminds me back when I did x.400 mail for a living (at british telecom) Sprint had a implementation that completely contradicted the ITU standard - Sprints response was well just put a fix in for sprint's mail systems.

ICL also though that even if the standard said such and such index MUST start at 1 that they woudl start it at 0 - cue some nice divide by zero errors - Not surprised we don't have a UK Mainframe company any more.