I can't get any feeds to work with twitter feed: date/time stamps and GUID errors

Yes, I have this problem too.

Blog: http://blogs.babiesonline.com
Twitter account: babiesonline

First I tried using a feedburner feed url:
http://feeds.babiesonline.com/babieso...

Then I added the Wordpress feed url:
http://blogs.babiesonline.com/?feed=rss

Neither one works. I only get the ever popular error:

We couldn't find date/time stamps on items. Please make sure your feed contains valid pubDate entries for each post, or select 'based on GUID' in twitterfeed settings.

(Side note, I had to view the source code to see the full error. The yellow triangle only generates this text when you hover over: We couldn't find date/time stamps on items. Please make sure your feed contains valid...)

Of course, that was all based on the setting 'Post new items based on PubDate'

So I added the both urls a second time, with the GUID option selected

The wordpress feed (http://blogs.babiesonline.com/?feed=rss)
At first generated the error: we couldn't parse this feed, please check the URL is valid. we'll keep trying.

Then I added the feedburner feed
http://feeds.babiesonline.com/babieso...

Now both feeds with the GUID option selected generate the error:
We couldn't find GUIDs on items. Please make sure your feed contains GUIDs for each post, or select 'based on pubDate' in twitterfeed settings.

And both feeds with the Pubdate option selected generate the error:
We couldn't find date/time stamps on items. Please make sure your feed contains valid pubDate entries for each post, or select 'based on GUID' in twitterfeed settings.

This is no fun :(