Firstly, I'm not even sure this is a theme problem, but my website has suddenly messed up. It's meant to be running the default kubrick theme (with a few changes), but if you look at the site (www.shallwesingasongforyou.co.uk) you can see that it's all messed up, with a grey background, lines messed up, and the sidebar pushed way down the right side.
However, this didn't happen just after I'd edited the template (I'm pretty sure) and I only noticed it after my last post (but removing the post doesn't fix things). I've uploaded the originals of all the template files I ever edited (index, sidebar, header), but it didn't work, so I've uploaded my modified versions again.
If you click on individual posts, the site looks fine. Also, I have a page on the site (http://www.shallwesingasongforyou.co.uk/?page_id=30) and it looks fine.
If you look on the main page, you'll notice that not only is the sidebar displaced, but the font of it has been changed from the standard kubrick font. Does that help investigations?
Does anyone have any idea what's going on?