The RTW planner on SkyTeam's website agrees with you,
MSPeconomist and
Scandalrag!
I just checked out a route (actually going the other way) and came up with this valid itinerary (bracketed locations are connexions only):
LHR-(AMS)-NBO-(BOM)-ICN-SYD-EZE-(FCO)-LHR
(And it already gives the SYD-EZE leg on AR, even though they're not yet joined up!) I'll see if I can get a route with PER-EZE non-stop, just so I can fly '
under the pole'!!