The only details I can tell you is that I had 8 UDFs, some string, some numeric. If they went missing, every single one of them went missing. (An item either had them all filled out, or had none filled out, depending on the type of item.) There was validation on only one field. The ones that had the info deleted had nothing in common that they did NOT have in common with ones that kept their info that I could see (all had extended descriptions, different product lines, etc, etc).