Something is buggered in the forums, to be more precise, the signatures.
I present you this lovely page filling signature:
As you can see it does a spiffing good job of filling my screen(1280x1024) with no content at all. The blank lines at the bottom are persistent in all signatures. Some have more then others, in this case it's about 14 to 18 lines but most signatures have about 4 to 8 lines at the bottom. Not quite sure what is causing this.
EDIT: Noticed I have a couple of those lines myself. Tried removing it but the signature editor doesnt show them. Either it's adding them afterwards when saving the signature or its in the rendering portion of the forum. My money is on the latter.