[Phill]

Thanks Peter, big one (or, as apparently I'm now titled "Hyperbaric Therapy Provider", dunno what's wrong with Chief Diver).
Dive Computors, read the instructions, they all tell you not to rely on them totally for decompression information (and one tells you that if you do you will suffer from DCI at some point). They're a very useful tool, but remember you're carbon based - they're silicon based and humanity hasn't evolved (although kit has) since the basic laws of physics and physiology were worked out (when tables were calculated by putting people in chambers and bending them!). They are specifically banned from use for sole decompression information in the Diving Operations at Work regulations 1997 (and no aspect of the industry objected to this in the regulation writing period).
In 1989 two things happened of significance in the recreational diving world, and sports bends in Scotland statistically trebled that year. This has been maintained ever since - with the obvious steady upward trend accountable for by the increasing popularity of the sport. BUT we are all seeing a steady increase in the severity of the type of bend.
Think that's covered most of the uncertain remarks over the last couple of days - probably not though.