I have nbd's pre-RC5 with qos-scripts installed. I installed UPnP as per the wiki, and everything looks like it works. Azureus says it establishes the port mapping correctly etc, and if I look at iptables -L I see the mappings under FORWARD. But if I go to grc.com and ask to port scan the supposedly "open" ports, it says they're closed!
Here's the output from the upnp plugin in Azureus
[18:15:15] UPnP: root discovered = http://192.168.1.1:5431/dyndev/uuid:0014-bf9e-035300788d94, local = /192.168.1.3
[18:15:15] Downloading: http://192.168.1.1:5431/dyndev/uuid:0014-bf9e-035300788d94
[18:15:15] Relative URL base is unspecified
[18:15:15] Residential Gateway Device
[18:15:15] desc=http://192.168.1.1:5431/dynsvc/Layer3Forwarding:1.xml, control=http://192.168.1.1:5431/uuid:0014-bf9e-035300788d94/Layer3Forwarding:1
[18:15:15] urn:schemas-upnp-org:device:WANDevice:1
[18:15:15] desc=http://192.168.1.1:5431/dynsvc/WANCommonInterfaceConfig:1.xml, control=http://192.168.1.1:5431/uuid:0014-bf9e-035301a08d94/WANCommonInterfaceConfig:1
[18:15:15] urn:schemas-upnp-org:device:WANConnectionDevice:1 *
[18:15:15] desc=http://192.168.1.1:5431/dynsvc/WANIPConnection:1.xml, control=http://192.168.1.1:5431/uuid:0014-bf9e-035302e08d94/WANIPConnection:1
[18:15:15] desc=http://192.168.1.1:5431/dynsvc/WANPPPConnection:1.xml, control=http://192.168.1.1:5431/uuid:0014-bf9e-035302e08d94/WANPPPConnection:1
[18:15:15] Downloading: http://192.168.1.1:5431/dynsvc/WANCommonInterfaceConfig:1.xml
[18:15:16] Device speed: down=11.92 MB/s, up=11.92 MB/s
[18:15:16] Found WANIPConnection
[18:15:16] Downloading: http://192.168.1.1:5431/dynsvc/WANIPConnection:1.xml
[18:15:16] mapping [0] 32205/UDP [Azureus UPnP 32205 UDP] -> 192.168.1.3
[18:15:16] mapping [1] 32205/TCP [Azureus UPnP 32205 TCP] -> 192.168.1.3
[18:15:16] mapping [2] 32255/UDP [Azureus UPnP 32255 UDP] -> 192.168.1.3
[18:15:16] Mapping UDP tracker client port (UDP/32205) already established
[18:15:16] Mapping Incoming Peer Data Port (TCP/32205) already established
[18:15:16] Mapping Distributed DB (UDP/32255) already established
[18:15:16] Found WANPPPConnection
[18:15:16] Downloading: http://192.168.1.1:5431/dynsvc/WANPPPConnection:1.xml
[18:15:17] mapping [0] 32205/UDP [Azureus UPnP 32205 UDP] -> 192.168.1.3
[18:15:17] mapping [1] 32205/TCP [Azureus UPnP 32205 TCP] -> 192.168.1.3
[18:15:17] mapping [2] 32255/UDP [Azureus UPnP 32255 UDP] -> 192.168.1.3
[18:15:17] Mapping UDP tracker client port (UDP/32205) already established
[18:15:17] Mapping Incoming Peer Data Port (TCP/32205) already established
[18:15:17] Mapping Distributed DB (UDP/32255) already established