Today I was beginning the part of "Boethia's calling" quest, where you have to get rid of boethia's former champion. Until now, everything seemed fine. Once I arrive at said mine, a wall that shouldn't be there blocks my path and makes it impossible to advance any further.
I will illustrate my problem with this video
http://www.youtube.com/watch?v=3m64aKqV-xc&feature=related
As he begins his descend at 4 min 22/23 sec. you can clearly see there is no wall blocking his path at the end of the stairs.
I am really irritated by that bug as there's absolutely no way to make it go away.
Tried exiting and re entering, loading another save, nothing works

Anyone else stumbled upon the wall problem yet?