[Endoperez]

Yes, no effect.

There are "Fire Crossbow", "Fire Boulder", "Fire Composite Bow", "Fire Bow of War" etc etc weapons for each weapon that is affected by Flaming Arrows. Edi's database lists these in the weapons section. You can report this as a bug in the bug thread, if it hasn't been put to the shortlist already. If you haven't reported bugs before, remember to mention the weapon ID number in the report (you can see it by pressing shift+i while viewing a unit that has Great Bow as a weapon).

If you have time, I'm sure Edi would be thankful if you went through and checked out which other ranged weapons are still missing flaming versions. It shouldn't be hard to do if you use the database.