I'm also having this problem. I posted about it in the bug reports -- viewtopic.php?f=2&t=8700
-- where I gave a pretty detailed writeup. It may or may not be a bug with Suffusion, but I still haven't found a fix for it.
Getting rid of the borders doesn't help. It looks the same -- cutting off the content but without borders.
One interesting thing about this is if you resize the browser, it snaps out and opens up the space for the content. This happens on Safari and Chrome (Webkit browsers) on a Mac for me.
You mentioned that 'Drake' found a solution for this -- Is it something other than the border none css here? I'm not finding this. Can you point us to a link for that?