I've got a similar problem; I sell an item on Etsy, use Paypal to generate the shipping label (which is now accessing the eBay shipping database apparently), and after confirming & printing label, there is no longer a popup which enables me to close the label page and go back to my PayPal page...no biggie, but when I do get back to PP, the tracking number and shipping confirmation are not showing, and I have to enter the info manually. I haven't had it switch back to erase that info, though...are you entering any tracking info when you mark it shipped? I'm glad we non-eBayers now have access to the eBay shipping database, but I wish they'd ironed out a few more of the kinks first! good luck...
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