I am playing the story mission where i have to free Captain Marshall in the Authority Prison. I have just free'd him from his cell, killed the initial batch of enemies and we have progressed to a court yard. I gave him cover as he moved through the court yard, killing a bunch of guards including one on a sentry gun. He then tells me to open up the security gate so he can get through, i've shot the generator, come round to his stairs and opened up the gate but he will not respond or progress through the gate meaning i cannot get any further in the game!! I have tried loading up a previous save from 5 minutes before (before i had free'd him from his prison) but it still didn't work!
Not very happy as after putting 6:30 hours into the game i've now got a game ending bug!!
This video at 49mins shows where i am:
http://www.youtube.com/watch?v=sWwIEyOeZ4o
Andrew