I just went from 3.6 to 4.0b3 (forced due a lot of Dude complications with 3.6 backups not working on 3.6 Dude) and the image I am using loses all of the names, it is just green blocks. I am looking at this through the HTTP interface via Files (the automated export) and Map (generated when you click on it).
Is there any way to fix this or is this a bug?