Thanks for the explanation; I hadn't realised that. As it happens I'm with DGS on this and think it's far nicer to only have the action on the last writable field.
Actually, in my opinion, it's really high time a new style guide was written up, especially now that the Acorn ones are both out of date and no longer available. Perhaps it could be done as a collaborative user effort? Although on second thought that may be a recipe for disaster!