I just wasted an hour of my life trying to "Fix" my blog, that never should have been "broken" in the first place.
I think I tracked down the problem to the Alliance of Free Blogs list, perhaps. It MAY have been causing my sidebar woes, but I don't know for sure. All I know is I did NOTHING to it, and all of sudden my sidebar is at the bottom of my page.
The annoying "stock" banner is back, as I've forgotten how to get rid of it again.
My apologies to any of you who may have visited in the past hour or so and seen some strange things pop up on here.
Oh well, the sidebar is back where it should be, but I've removed the Alliance and Homespun blogroll lists, which seemed to fix the problem.