IUCC reported a sub-optimal path to a network in the US, that was being routed via G�ANT2 then TEIN2.  It was found that this prefix was being advertised by Mich\[igan\]Net to Abilene and Starlight, but whilst Abilene discarded the route, Starlight advertised it on to APAN, and on to TEIN2 and G�ANT2.  APAN and TEIN2 have now stopped advertising this route and a more direct path is taken to the network.