Hi Delia!
Actually, I had been using the 1.8.? version for quite some time at. 3200 products, with with no complaints on v_products_name, but that may be because I was using v_products_model as the key (which I believe must be unique).
I was having problems with UPC codes with 1.8, so I figured I'd just MAKE 1.10.1 work. Wasn't hard to do once I stopped complaining (sigh) and dug into the code. I think the change to unique products_name is tripping people up a lot.
ALSO, and this seems to be very important, to use 1.10.1 you MUST convert your cart to UTF8. This is not hard to do. Dr. Byte has a tool for doing the conversions. Once I did the conversion, and made all my products_name unique, I was able to get 100% of my products to export to the xml file and feed accepted by google.
I hope this info is helpful to you and others.
-cj
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