Watch carefully the behavior of the field 'Confirm Password'.
Ah... then if mobile is definitely getting a different composer, then a resized desktop composer I'd accept the compromise of: < 768px? hide preview box altogether
@a_5mith has already pointed that out here. Yeah I noticed this too.
You would need to put the widget in the Categories Siderbar section. If you don't have this section, your theme needs to be updated. see here for needed changes.
@psychobunny Good to know, i was getting happy when i had threads with 800 views and then i noticed this bug heh