When installing wallet + mist v0.8.3 you see something like this:
What is meant by "chain structure"? Is the "222 of 4446" just a download progress indicator or does each single part have a meaning?
I found the relevant code, including:
Downloading chain structure __displayState__ of __displayKnownStates__
This seems to imply that "chain structure" refers to the changes in state of the Ethereum Virtual Machine, with, if I understand correctly, many changes in state per block.