Try calling Qatar Airways (449-6666) and asking the reservation agents and their supervisors. I've just been on the phone with them several times this a.m. and they've confirmed that anyone with less than 3 months remaining RP validity will not be allowed to travel on trips of less than 3 months.

I find this hard to believe as well but I've now heard it from 4 different sources within Qatar Airways reservations.

Only way of checking for sure is to call Qatar Immigration but they aren't picking up the phone. Maybe closed today