Hi. I got two NAS boxes (excito B2 and pogoplug V4 with archlinux). Recently installed the newest version of btsync on both of them. Everything (btsync) was working fine till then. Problem is that the web-ui does not respond at all on neither of the nas'es. After some trial I found that by disabling "use UPnP for port mapping" web-ui works fine agin. Syncing actually works too. The pogoplug nas is connected through a wrt54g v5 router. The B2 got an built in router and is not a part of the wrt54g network. I tried enabling upnp on the wrt54g but it did not work when upnp port mapping was enabled.