I've (until I can totally integrate my forum into my site) included my forum in a wrapped iframe. I applied a Rockettheme Sporticus theme and now the forum doesn't completely fit into the frame. Any ideas?
to take a look http://www.savagefighter.com//index.php?option=com_wrapper&Itemid=8 (http://www.savagefighter.com//index.php?option=com_wrapper&Itemid=8)
smf will not run well in an iframe.
for problems with your templates, I suggest you either a) user a different combination of template/theme or b) modify the template/theme to work together correctly.