Icecrown - Character 'instanced?' bug

My Deathknight "Fudisbest" seems to currently be bugged. No matter where I go, new town, continent, walk into a dungeon or RDF, it puts me in a seperate empty instance than everyone else; no players or npcs. I just reinstalled so I'm not sure what more I can do on my end.

open a ticket in-game

You might have a phased quest in Northrend that is doing it to you. Many of the quest lines including ICC and even Argent Tournament put you in phases in those areas.