Hi there
I have been building a respin of Debian Jessie and using your tools. Snapshot works great by the way!
The problem appears with the GUI installer - I am using the one from testing 9.1.0.
1. It reports a potential error when you exit gparted after partitioning. It's not an error. It appears to be capturing the exit code 0 and reporting it as a potential error. This can be ignored though.
2. It doesn't reset the live user or root password even when you select under expert install to do just that. Once the system is installed and booted into, the username is correctly changed, but the password is whatever was on the live ISO. This is the same for the root account.
I had a look at the code and it appears that you are actually renaming the live user account rather than creating a new account. I can see the reasons for this as it will keep any cosmetic changes that may have been made whilst in live mode but just wondered if this was causing the problem?
I am quite happy to do any further testing as required as I do think these are great tools.
Kind regards
Richjack