You may have received an email from Google Base yesterday similar to this:
On March 3, 2010 3:01:00 AM CST you uploaded to Google Merchant Center via FTP a file named "yourfilename.xml", but you don't have a data feed registered with this name. Please verify that you provided the correct file name, including correct capitalization.
They are aware that this is a bug and are working to fix it:
http://www.google.com/support/forum/...fe982779&hl=en