Same problem for us. In fact, with that upgrade, we noticed four changes to our wp e-commerce store:
1) Fancy notifications have disappeared.
2) The variations price display no longer works as far as the price changing when someone selects a variation.
3) Formerly, when someone clicked “More details,” the details showed in that window. Now, the person is taken to a single product page.
4) Formerly, when someone put a product in the cart, the fancy notification showed, and the buyer could decide whether to keep shopping or check out, but the buyer stayed on that same page. Now, when someone puts a product in the cart, the buyer is taken to the single product page for the item put in the cart, though logically, that buying decision was already made, so why go to the single products page now?
These are all fairly major changes in user experience for our customers.
I am somewhat new to the plugin world, so I guess I would ask:
Do plugins just keep changing like this, so each time one upgrades, one doesn’t know what to expect?
I have been an enormous fan of WordPress and the plugins. But I don’t know what to think with this latest development. Upgrading the software shouldn’t create the same trepidation as driving in snow.