We have some Japanese CD products with UPC (JAN Code) consisting of multiple leading zeros. Google base marked them as having "Invalid Unique Product Identifiers" and showed account suspension warning.
The JAN code might look funny but it is a valid code. We double checked those codes and they are valid. I can even search those CDs at Amazon Japan with those JAN Codes.
I believe I am not the only one having similar issues. Google team please attend to this asap to avoid false suspension and warnings.