Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040113
well, I got e-mail working now, it was the missing 'user specific
settings' that prevented preferences from remembering the password.
However, I had a fully workung phpgw 0.9.14 (including e-mail) converted
to 0.9.16, so I didn't expect I had to enter these things again.