Oops -- the URL to Fusion Tables was recently changed.
Whereas ODK Aggregate constructs a url:
https://www.google.com/fusiontables/DataSource?dsrcid=3459204
With new publishers, it should now be 'docid' instead of 'dsrcid'. I.e.,
edit the URL to:
https://www.google.com/fusiontables/DataSource?docid=1HxKn5PhZ1v0H8GYbiQ9C4KbiFnoenwPByLuQadQ
This was a result of a change from numeric table ids to encrypted ids.
A fix will be in the next update to ODK Aggregate.
Mitch