Hmm, you know... I wouldn't be surprised if it was a revision thing. We actually haven't done much testing on product nodes with revisions, but I know it was near the top of Lyle's list of things to deal. Regardless, I actually don't know that Views would bypass the product module's usage of the node ID to attempt to load data based on the vid. It sounds almost like a content caching issue. (But I think you've already cleared all the cache tables, so I'm not sure.)