I updated last Friday to 20.2010.36-2.203.1
I then read this
http://wiki.maemo.org/N900_Email_Opt...for_Push_Email
Which looked like they had removed IMAP.
I could only find a POP3 option so I assumed that they had removed it. Today I tried again, deleted the remnants of my old account and started again with the wizard - Magic! I found IMAP4 - Dooooh
Maybe with future updates a few of the configs could survive. Hopeful??