and now the sidebar is screwy! But I suspect that'll work itself out as the recent batch of images I've posted (which are probably too large to begin with) slide their way off the main page and into the archives, so it's no big deal. If it has to be off-kilter in some way, I'd rather have the posts above the sidebar than vice versa. And I was getting tired of the old look around here, anyway.
Thanks to Greg Burgas, Psychbloke, and Brandy Danner, the Library Ninja for their suggestions in dealing with this.