IE 7 -- extraneous bottom scrollbar....

here at work we build lots of sites, and recently we have found that in
IE 7 an extraneous scrollbar appears at the bottom.. I was just
wondering if there's anything in general that might affect this and how
it could be fixed.. I know this is not strictly a css question, but
well, just wondering if anybody has any suggestions for this problem, as
it is happening on more than one of our sites (and often problems like
this solution lies in css....

I looked this up.. only concrete thing I found is something about
italic fonts.. but our sites do not use italic fonts..

thank you very much..