Update - Wednesday December 20
Fixed a skill exploit that allowed players to walk through closed gates.
Just tried it a little while ago after getting the update and there is a few spots on the gates that you can still do this, Unless Anet is talkin about something else. 
                
            Gate exploit fixed? guess not :(
Eather
Dragonious
                    They are talking about probably the Isle of Weeping Stone.
                
            