Duplicate tweets being sent. As a result of temporarily moving to a new data center, some items generated duplicate tweets. Status: Issue fixed and being pushed.
No tweets being sent for updated items. As a result of the Twitter API having the same return code for service de-authorization when Twitter is down, if we attempted to send a tweet while twitter was down, in some cases we would remove the OAuth tie between Google and Twitter. Workaround: Go into the Publicize -> Socialize screen at http://feedburner.google.com and re-add your Twitter account even if it already appears to be there. Status: Actively being worked on between Google and Twitter.
500 Error received when trying to connect Google and Twitter. Workaround: Please try again. This is an intermittent error that is being investigated