(build 18973) Could not map UPnP Port ?

[DaFrog]

[2010-04-11 00:55:10] UPnP: Mapped TCP port 57480 -> 10.0.0.3:57480

[2010-04-11 00:55:10] UPnP: TCP port 57480 -> 10.0.0.3:57480 mapped successfully.

[2010-04-11 00:55:10] Results: Port is open. Your network is properly configured.

[2010-04-11 00:55:10] UPnP: Mapped UDP port 57480 -> 10.0.0.3:57480

[2010-04-11 00:55:10] UPnP: UDP port 57480 -> 10.0.0.3:57480 mapped successfully.

[2010-04-11 00:55:10] UPnP: Getting external IP

[2010-04-11 00:55:10] UPnP: Host 'http://10.0.0.1:2033/DeviceDescription.xml' added to cache.

[2010-04-11 00:55:11] UPnP: Got external IP: *.*.*.*

[2010-04-11 01:15:11] UPnP: Could not map UPnP Port on this pass, retrying.

[2010-04-11 01:15:13] UPnP: ERROR removing TCP port 57480: (714) The specified value does not exist in the array

[2010-04-11 01:15:13] UPnP: Removed UDP port 57480

as you can see when i start the program it perfectly maps the port but then after 20 mins it for some reason to me unknown trys to remap it and fails and can´t map anymore before i restart the program where it again maps perfectly at start.

is there any way to change this behavior of readding after 20mins ? maybe make it not try again ever.

is this a bug ? didn´t have this behavior in the prior beta build.