Yup...noticed it yesterday. I was hitting p5, and while I DID kill the vh w/ 10 rockets and 2k, I was unable to shoot and kill a single ack gun. I took four passes on the same gun, and was unable to kill it. I deack fields every day. I never have an issue, nor miss (using 20mm/30mm that is. 50cal still a pain) and I WAS using 20mm on p5's ack.
I just gave up. Strategically we needed the field, but due to the ack/port bugs, I won't even try to take a port until this issue is fixed (THOUGH it was)