I also have the same problem,
Version 1.6.1 worked fine, you could see everything.
Without making changes. I did the update to 1.7.0.
open an invoice you can see only the head is the tail.
If forced to put the logo does not open anything and an error message appears
TCPDF ERROR: [Image] Unable to get image: //components/com_virtuemart/shop_image/vendor/Fat_Elettronica__4ea2ce96028d2.jpg
The command {logo}is in the Head (invoice template), if you delete it, there isn't more reporting error.
Logic tells me that the problems are in the strings of the new version, it seems clear