Rather grumpy with Qantas at MEL. I'm on a First Class LH ticket (220 stock), MEL-SIN-FRA, then another FRA-LHR, also 220 stock.
LH are the MSC for the purposes of the baggage rules and they allow LH to LH itineraries to be checked through on different PNRs (indeed *A to *A is fine). However QF point blank refused to do this, whilst admitting that they could.