Hello
I ve a DNS 320 and i also have wireless network issues after upgrading to thethe issues latest firmware 1.0.43 v.
I have solved by
-attributing a fixed ip 192.168.0.254 (fix in this forum) The last group of must be 264 (the 3 first depend on your network)
subnet etc…
-unhide ssid
my wireless usb dongle is a DLink DWA 160vA2 firmware 1.50E
My router is DIR 825
Hope this helps.