In the 0.5.8.9, 0.5.8.7 versions I'd been able to use uPnP from Vista through my Thibor-firmware Linksys Router.
As of 0.5.9.0 I can no longer use uPnP. I checked with my Linux install of 0.5.9.0, and it does enable and release ports properly on start-up and closure.
0.5.9.0 Loss of uPnP function
Re: 0.5.9.0 Loss of uPnP function
I'd think you'd want to put this under support
Re: 0.5.9.0 Loss of uPnP function
Try a newer firmware, I use DD-WRT now, since last I checked thibor is no longer developed. Just make sure you don't brick it since you are switching to a different firmware.