From time to time you might see a rather worrying error from google base regarding your last uploaded feed. 

Bulk upload failed. No items are live. There are too many formatting errors. 
(see screenshot above) 

Too many formatting errors problem can sometimes be caused by a file that wasn’t uploaded properly. I’ve experience this happen through both the FTP method and uploading through the dashboard. Try waiting a few hours and trying again this normally resolves the problem. Make sure your upload in binary and the transfer fully completes however.