PayLoom 3 not publishing thumbnails in RapidWeaver 7

I upgraded from PayLoom 2 to Payloom 3 and RW6 to RW 7 yesterday and ended up having a lot of problems. Initially the PL3 shop page was all black but on republishing all files a number of times the theme colors came back. Now it will not display my product thumbnails but if I click on a product the image appears with all the info etc in the new window that opens up. Does anybody have any idea what I can do to make PL3 publish the thumbnails too?
The websire is if you want to have a look