Alas, there are no 'Additional Options' for me. I went through all the customizing pages I could find before I made the post. Under 'Presentation' I have 'Basic Options', but that's the only category there and the sidebar position isn't part of it. 'Style' only includes colours, 'Modules' includes what I want =in= the sidebar, 'Text' and "Links List' include nothing relevant. There is a 'Custom CSS' tab today that I could swear wasn't there yesterday, and I'm sure I could override the positioning that way, but if there's supposed to be a simple radio-button/dropdown sort of option somewhere, well... there isn't. I use Opera, so I tried it in FF as well in case there was some weird browser issue hiding the 'Additional Options' portion, but it doesn't show up there, either.

Thank you for the advice, all the same. :)