Username or EmailPassword
That's Tiger behaviour. In Leopard that's no longer possible.
My leopard install begs to differ :0)
Tested when I saw the cartoon and tested it again now. It works fine!
I just installed 10.5.3 and this still isn't fixed...
Just thought I'd mention it...
Still, if this the biggest complaint we have with Mail.app, then it seems it's a pretty cool app :-)