Hey Brenda, good find! Fixing the quantity box bug. (I was wondering about that myself. ) Also, regarding your Javascript error, why don't you try refreshing the page for me. That JS file may be cached in your browser causing the error, because it's been updated in 7c.

@Tanjerine - I couldn't reproduce your preview bug on the test sites, with new products or existing products. I'll keep an eye out for it, but I think I'm going to go for the release.