I went east to the Great Portal and went through the whole thing with the imps coming out. Went back to the Castle, upgraded to sergeant and given three new tasks. Finished Almeria, then decided to do the Tower Colony one.
First I try to portal to The Great Portal to get close, since I haven't been to Tower Colony yet. No dice. Just takes me to the Food Depot and tells me there's trouble placing me in the zone.
So I just start walking. Go through Almeria, across the toll bridge and.... black. Solid black screen and won't let me go east.
Umm.... what?