Okay, I've done everything I can think of to get rid of that beige-ish section to my background to the right of the "body" section of this blog. I've changed the widths of the background smaller, larger, etc. When I change these settings in "template", and then click on "Preview", the extra section there doesn't show up, but when I go to the blog on the Internet as normal, there it is.
Does anyone know how to fix this? I'm using the "old" blogger for this blog, so there is no "layout" tab. It's driving me nuts ;).
I now return you to your regular blog programming.
Update: Thanks to Lee planting bugs in my brain, it's resolved. Apparently one of the posts' margins exceeded it's parameters and created the expansion.