Firefox display difficulty

Not sure if this is the right forum but here goes....

I've set up my first google map at
http://www.bevpub.co.uk
complete with new pins, html tags and even the nice little thumbnails,
all linked from a mysql database. I managed all that with the help of
this forum...thanks.
One small problem remains.....the map is way off to the right when
viewing with firefox. I've tried absolute postioning..but no luck.

Its driving me mad! Any ideas?