****UPDATE 3/31/2015 2:00pm EDT: We have determined that the issue was due to an unexpected server restart in Azure and we are raising the issue with Microsoft support to find out why this server was restarted outside of normal maintenance.****
****UPDATE 3/31/2015 10:50am EDT: This issue appears to be resolved. We are continuing to investigate to see what the underlying cause was.****
We are investigating reports that some customers are not able to access email templates, either in the Email Template designer or in the Email Send record. These reports are coming from customers deployed in the US Azure Data Center. Initial tests show that the Email Templates are loading fine for our testing, but we will update here as we learn how widespread this issue is and what the cause is.