I was having the issue and logging out to character select and back in on the same character let me travel into the dungeon.
Not a permanent fix but might be a usable work around.
@Turelus - EU PC Megaserver "Don't count on others for help. In the end each of us is in this alone. The survivors are those who know how to look out for themselves."
As I wrote in the other thread.. This hasn't worked for me... I've been logging in and out all day, used the /camp method to 'soft reset'. Done a repair.. even sent off a ticket and wasted my time opening my eyes to read the reply!
Still no harm in trying I guess if you've not tried already...