With 2.2 rc1, horizontal scrolling doesn't seem to work (at least on my installation of OS X 10.11.4) with wide tables that are contained in table floats, making it impossible to edit columns past the window boundary. Is there a setting/workaround for this?
Also, while investigating this, I went to Preferences: Editing, toggled Cursor follows scrollbar, and LyX crashed when I hit Apply.