Hi,
this is not at all the first time that I was doing the Snowblind fractal, but it was the first time I got stuck behind an invisible wall… Apparently, if was bumbed by the shaman near the limit of the room, and got into an ice wall… the other members of the group saw me INSIDE the wall ; for me, there was an invisible wall : I could get out, nor hit the boss. I could however be hitten by his aoe :/
Here is a video of my Asura trying desperatly to move forward ! :p Hope it helps.
http://youtu.be/-vhkmrHM9cc