[JohnK]

I hope that I notice a JQ operated flight when making a booking on QF website. In theory on the QF website any codeshare flights have a small green square preceding the flight number to indicate that it is a codeshare flight.

As long as mainline QF does not stop flying to/via SIN then it is really not an issue. Do not accept, or even continue with, a booking containing a QF codeshare on a JQ operated flight. That is unless you realy want to be on a JQ operated flight.