Google Checkout: Failed to load data for element

Customers are getting ‘Failed to load data for element : “product-list” data-url…’ errors erratically with Google Checkout’s cart script.

The page with the problem script is here but it seems depending on browser, line speed and OS, you might or might not get the error.

There’s a thread on Google with more details & screen shots here

Any idea if this is Google’s problem, something WordPress related or if a plugin might help?