RSS feed not validating

Hello,

I am having problems with my rss feed validating. I think the problem started when I upgraded wordpress on 1-29-13 so I then upgraded again the 3.5.1 and it stil hasn’t fixed the problem. The crazy thing is that is is showing up in web browsers just fine but isn’t being pulled up by and feed validators, feedburner or google reader correctly. Google reader and feedburner pick them up but it was everything that was before 1-29-13, before, I made the initial update. Any advice would be great. Thanks!

My site is http://www.prettypearbride.com
RSS feed is http://www.prettypearbride.com/feed