In reply to Ehmarra:
There are a few grade changes to things, some up some down. Quite a bit is just because there has been time to get a better consensus or in some cases better beta was discovered which has made them more attainable.
The old rock fax guide was a bit crap to be honest, the bowderstone section in particular was all over the place although there are a still a few minor errors with the new one
Still it's a good guide and is certainly a major improvement over anything which has existed beforehand.