I use the current production interface -
www.fastmail.fm - you guys need to give these catchy names, like OSX releases..... so we know exactly which we are talking about!
Anyway - if I dabble with the new AJAX beta, will this corrupt or otherwise break my current sieve code I'm using?? I think I'll back it up in any case, but can I switch back and forth seamlessly between the interfaces without issues.....