Axel -
You might consider a button to print only the content from
the topic frame; this would create more room on your page for
content only, and perhaps save the bleeding edge. Or, you might set
the topic BODY width to 100%; that might accomodate the changes it
encounters when printing.
Another alternative is to create a different style for print
media (IE only). Here is an example of using css to change a page
component (I posted it previously, and found some errors, so it's
good I looked at it again..):