Fire rendering in viewport, but not in final render

Guys, I have a strange problem, and am wondering, if it’s Blender, or just my PC. I’ve done fire and smoke sims before, and never experienced anything like this. That is, the fire sim is rendering fine in the viewport, but gives no result in the final render. I’ve checked probably all the otpions, to no luck. I’m out of ideas.
Help from anyone?
Link to blend:

http://www.pasteall.org/blend/37447

Thanks in advance

Purely emissive volumes seem to not generate any alpha. I’ve managed to make it alpha-renderable by adding the emissive shader and a white volume scatter, with the same strength as the emission.

Man, I don’t know how to thank you! :slight_smile: