User blog comment:Sarah Manley/Try the New Wikia Editor/@comment-1361074-20110729000632/@comment-126761-20110729161121

From what I'm seeing, everything seems correct. If you have the visual editor switched off, you get the new layout, source mode, and no option to switch to visual mode.

(Note: there is a separate issue I see that the source mode toolbar buttons on/off preference is a little messed up, which we'll look into).