Sometimes, a strange character gets added into a post and it can cause strange validator things to happen because the validator is not expecting character types other than the one specified in the html header. It's hard to say how an odd characters can get in there, but pasting from Word is one possible culprit. If you can see a way to reproduce the problem, let me know the steps and I can test it too. It seems to happen fairly rarely, but I'd be happy to look into it a bit more if anyone can figure out how to reproduce the trouble.
When it happens, you can pinpoint where the unexpected character is by looking at a feedvalidator.org report like this one (already fixed for this blog): http://feedvalidator.org/check.cgi?url=http%3A%2F%2Fuwant2gogo.wordpress.com%2Ffeed%2F
I used that report to see what part of the content had the funny character, then I scrolled up a little to see what post it was in. In this case, it was in the "NO COACHELLA? NO PROBLEM. You have SO much to do here in town...." post. Then I opened the post for editing in html mode and manually re-typed over the text that was hightlighted by feedvalidator.org and saved. Now when I check the feedvalidator.org report, it shows "This is a valid RSS feed." The few warnings after that shouldn't affect the ability to use the feed.
Can you try the feed again now?