Me too, the store window is not displaying on my eBay auctions, and the listings are not appearing in the store window on another site where I use the store window HTML.
This is at least the second time this has happened if not the third time over a few months.
I will submit the help form, but if you want to pass this along to the engineers now, my ID is ginni.
I realize this is a free service, but it makes me wonder about the paid services.