I have this same issue along with poor performance and I am unable to connect to my SlingBox now, which was working prior to the firmware upgrade. I read in another post that you may need to re-configure and not use a saved configuration (which is what I did). I may try restting the router to default and then try the re-configure and see if that fixes the issue. It's pretty sad that D-Link didn't test this firmware to make sure it was compatible with previous configurations. I see they are not doing much to answer any questions as well, very disappointing.