I reckon that this is because the casper's accessibility ubiquity hook wants to su to the newly-created user, but that user hasn't been created yet at that point in the proceedings. I'm not yet sure about where it would be best to fix this.
-- Accessibility options are not preserved on installs https://launchpad.net/bugs/50319 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
