MAS do regard S'pore and Brunei as being domestic destinations.
On the other hand, Malaysians regard Peninsular Malaysia (Malaya), Sanahh and Sarawak (thee two states on Borneo) as distinct entities. I wonder if a flight from KL to Kuching or KK would get me some miles on my FD account.

And another question: am I likely to get FD miles on a code-share MAS flight? (will be flying Moscow–Tashkent–KL which is code-share MAS and Uzbekistan Airways)