I use eMule 0.50a on Windows 8 Pro 64 bit, my router runs OpenWRT 12.09 (with iniupnpd).
When I start eMule it prints this in the logs:
Trying to setup port forwardings with UPnP... ... Connecting to the network is delayed, because UPnP is still busy configuring the port forwardings. ... UPnP failed to setup port forwardings, please foward those ports manually if necessary!
The ports are not forwarded on the router.
UPnP works fine with other software on the same PC, like: uTorrent, Skype, miniupnpc (great for testing...)
Is there any known problem with eMule UPnP on 64 bit Windows?