I have tried 1.20 1.21 on my A2 655.
For Vista SP1, it can always discover the network map and UPnP device correctly.
(1.20 with XP SP2)no problem
(1.20 with XP SP3) The Windows cannot detect the network gateway and cannot open the UPnP interface, I am sure that the UPnP and SSDP Discovery services are running.At the same moment, the Vista SP1 machine get them without problem
(1.21 with XP SP3) These failure phenomenons still occur. I reset the 655 to factory default. This time I don't use .gws configuration file and fill in blanks manually. The UPnP problem seems to be improved a little bit on the XP SP3.
Why do I call it "little bit" because it cannot show the "gateway" sometimes. I have to press "F5" to enforce the Windows detect the network.