Upstream development of libupnp has died/forked/moved to the pupnp project at http://www.libupnp.org/ or http://pupnp.sourceforge.net/ and is presently at version 1.4.0. The website claims that it is 100% compatible with libupnp and, as such, I suspect an upgrade in Extras is desirable.
Thanks i'm aware of this but it's quite more difficult because the original libupnp is not dead officially and the pupnp maintainer claims it is ... I will look to this ...
New 1.4.0 version available for test in devel tree.