At the start of the installation when asked to choose partitioning scheme and "Guided whole disk encrypted lvm" is chosen installation freezing... While choosing other two options installation progresses as expected. I don't know from which snapshot this bug occurred, but know for sure it wasn't there all the time. During installation (on my work machine) that i did some month ago i did installed with this very option (guided encrypted) and it went just fine. PS I did marked this bug as critical because in my opinion encrypted disk is a major privacy enhancement without which (imho) large portion of a privacy minded users will not use Neon.
Forgot to mention it... it holds for both: 20161222-1018 user edition and 20161222-1019 user LTS editions. I haven't tried with dev edition.
not like anybody cares (apparently), but at some point this was fixed.