That's a new technique. <img src="/ubbthreads/images/graemlins/up.gif" alt="" />
You can also run towards the gate, then after the guards stop you and the conversation ends, click inside the castle again right away; they will not be fast enough to stop you a second time. If you have the teleporter stones with you, you can toss one past the guards into the castle courtyard, and teleport in.
Welcome to the forum. <img src="/ubbthreads/images/graemlins/wave.gif" alt="" />