"Contains No Data" In Firefox

[tool_462 0]

I am wondering if there is something I can change so Firefox stops popping up a little box that says "Document Contains No Data" or something like that when I load web pages occasionally. After I click "ok" it proceeds to load everything on the page normally, save an occasional side-bar or banner advertisement. Any ideas?

[Wilhelmus 1]

This article can help:

http://kb.mozillazine.org/Document_contains_no_data