When I try to add my Twitter feed I get the next error: XML error: Invalid document end at line 1, column 1

It only works when I add the RSS feed for the twitter account.

http://twitter.com/statuses/user_timeline/9578762.rss

Adding to this issue... In my case, I cannot add the Twitter feed at all (using format http://twitter.com/statuses/user_timeline/xxxxxxx.rss). I get an error "A feed could not be found at ..."

Same for adding Facebook status feed. For example, using feed URL format for status updates (such as http://www.facebook.com/minifeed.php?status&id=xxxxxxxxx) gives me feed not found as well.

When you add twitter, just type in http://twitter.com/username and make sure your twitter are not protected. hope that helps... i mean it works for me.. cheers