Firefox has had some very longstanding printing bugs related to certain style rules. One workaround is to select the entire page (Ctrl+a) and then in the print dialog (Ctrl+p) click the bubble for Selection. This has a bad habit of slicing through the bottom line of text or image on the boundary of the page, but until all printing bugs are fixed, it may be a necessary evil.

Note: the rest of this post was for Firefox 4, so you can ignore that if the problem browser is Firefox 3.6.x.

If this page worked fine in earlier versions of Firefox, the problem might be the new HTML5 parser. A number of sites have been reported here as having issues. To turn that off:

(1) In a new tab, type or paste about:config in the address bar and press Enter. Click the button promising to be careful.

(2) In the filter box, type or paste html5 and pause while the list is filtered

(3) Double-click html5.parser.enable to toggle it to false (it should turn bold).

Then return to your schedule and reload the page. If that helps, you can just leave it that way. I don't think there are any essential features that require the new parser.

Firefox 3.6.2 is an older version of Firefox. Try Firefox 4, most of the Bugs related to that particular problem were fixed.