Also I got stuck on this page with only the "Pay on one page" (it was in French not sure of the label) and "Google Checkout" buttons working. I then switched to English then only the "Google Checkout" button was working.
How I got there :
- I bought the service product,
- got to quick checkout
- tried to use quick add (I was not able to use somehow )
- then I bought a Tiny Gizmo
I did not test with R9.04
This is blocking : I can't use eCommerce OOTB anymore, annoying
It works with Opera and IE8 on XP...