yes I checked. As you can see on this forum, I'm not only one who have this problem.

Nothing changed. I have only this router.

What kind of problems do you have? Something like this:

http://forum.mikrotik.com/viewtopic.php?f=3&t=62341

Now I upgraded to 5.17 and the problem is here again. I downgraded to 5.16 and reset, then restore the config, but still problem with wifi. Ping on wifi with 5.17: Pinging 192.168.1.1 with 32 bytes of data: Ping statistics for 192.168.1.1: Packets: Sent = 121, Received = 112, Lost = 9 (7% loss), App...

I solved the problem, for now. I reset config to default, restore the config from backup and upgraded to lastest version of RouterOS.

I have some problem with wirelless on RB751G-2HnD. I'm using it as ap-bridge. It was ok for few weeks but now I have ping delays on wirelless some times over 1000 ms and packet loss. There is no traffic on wirelless. I turned on debug for wirelles bot no log. On wired it is ok. Security is WPA2+EAP....