Have a Y class ticket on SQ 15 so ghought i should try to upgrade using UA miles but was told that SQ doesn't allow upgrades from north america to asia on 777 or 380 flights !! wTF? Do they fly any other plane. I think sq is fine airline but there are other good airlines in *A who do a great job of reciprocating. Anyone else have luck using staralliance upgrades from NA on SQ?