[alanterra]

Thank you, Myrrh. All good ideas. I'll try resetting Launch Services, and if it helps I'll post it here. It's hard to believe that it is in the account settings, as I can replicate this, but you never know. All I know is that I find it is impossible to set up a Mac without introducing at least one grave error that can only be fixed by a complete system restore (which then introduces a new error that can only be fixed with a complete system restore, ad infinitum).

Cheers