alt131 - 2:53 pm on Jun 8, 2012 (gmt 0)
Hi mminten and welcome to WebmasterWorld,
My first thought is to ask what is different about the blog page - then delete that to see if the sidebar lines up correctly. If so, you have the source of the trouble. Also, if you have been reproducing elements on the page using copy/paste, double check that hasn't introduced and error. Finally, does the code validate [validator.w3.org]?