Firefox 12 on Lucid - headers/footers don't print

Note: This problem has existed since Firefox 3. Lucid 10.04 2.6.32-41

When I print from Firefox, the headers/footers do not print. This happens on any printer. I checked the margins
using about:config and it shows top and bottom margins of .5 inch.

If I "print to file" and create a PDF, and view the PDF, sure enough, the header/footer are clear at the top/bottom so when I print, they don't
print since the printer does not print clear to the edges.

In Firefox 3 a few months ago (when margins were in the preferences, not just about.config), I messed with them, but
while I could cause some things to move, I could not achieve the desired effect which is to print like I have been used to
for years with the header/footer just below/above the top/bottom margin and the content inside that a bit.

This apparently is not a universal problem. Any ideas where to look?