Sidebar font has enlarged, dropping sidebar below posts

I use WordPress at my blog, which is hosted on GoDaddy. (http://echoesinthewind.net/) I use the Kubrick theme, and sometime over the weekend, the font size on the sidebar increased, knocking the sidebar down below the posts. This only happens when I am showing posts. When I view a page, click a tag or do a search, the sidebar font goes back to normal and the sidebar appears on the right side of the page, as is should. (For the time being, I made a new page and set that as the default view, and the font size of the sidebar was normal.) I went to the other themes offered, did previews, and the same thing took place, so switching themes is not an option (nor is it my preference). I am limited in what I can do; I do not know how to access the HTML for the theme. Can someone help?