I upgraded because I get error reports from Google:

Some items do not get inserted and I don't know why....

Feed status details

Outcome: Data feed has some errors. Some items contained errors and were not processed successfully, but all other items are active. - help
Number of items processed: 223
Number of inserted items: 181
Uploaded at: May 8, 2008 10:38 pm EDT
Processed at: May 8, 2008 10:39 pm EDT


Errors:
Error Bad data Line #
We recommend including this attribute. - help

isbn:

647
We recommend including this attribute. - help

upc:

647
The item is missing a required attribute. - help

description:

647

This is a product feed, why would it want isbn attribute? I see that it required a product description. Maybe this is the main problem? I have some items with just title but no description.