Other then trying to simplify your layout and test again, no.
Publisher is designed to exploit the technologies of the IE browser.
And that is a heaping pile of horse crap! If you use Publisher 2000, it will
look good in most browsers (some diligence is needed with pre 4.7+ nutscrape,
but the problems are generally minor like the last line of a full justified
paragraph will try to right justify, but newer versions of netscape do not have
that problem).
There is a legal problem here in that it is arguable that this intentional
effort violates one of the Consent Decrees M$ has entered into. I hope they fix
this problem in the version coming this year, or I am told there will be a class
action lawsuit (but of course I have been told that for a couple of years now;
you never know about lawyers).
There are a bunch of Firefox users, and still quite a few netscape users. It is
unimaginable that M$ would think it a good idea for Publisher to be unable to
produce web pages that display properly in those browsers. It is one of the
reasons I have stayed in Publisher 2000, but I am not at all happy about this
mess.