@Umklapp:
Umklapp reasons that, since there is only one attack roll, there is only one successfull hit.
I think that, although only one attack roll is made, each arrow fired is a successfull hit.
I could not have explained it better myself

@Umklapp:
Umklapp reasons that, since there is only one attack roll, there is only one successfull hit.
I think that, although only one attack roll is made, each arrow fired is a successfull hit.
I get that the bow bestows the Frost magical ability to its ammunition, i.e. the two arrows. Each arrow then deals the 1d6 magical damage when it hits the target. The fact that the two arrows share the same ToHit roll to verify if they hit should have no influence on this mechanism...
elleon
The other possibility is that the bow add 1d6 to its projectiles every time IT hits and since there is only one attack roll... Besides, I would find odd if you could increase the magical power of your bow by using a feat that is neither magical nor related specifically to that bow
On the other hand, if only 1d6 of damage is bestowed, on which of the two arrows would you bestow it? Only one of them (in this case, which one?) or would it be evenly spread over the two arrows?
This is relevant in case the target has the Deflect Arrows feat: the target would deflect one of the arrows and the other would hit. How much Frost damage would be dealt in this case?
elleon
I have not considered this, but... why not? These are arrows that fly together and could be both deflected with just one action.If we are sticking with the "ONE HIT", Once per round when you would normally be hit with a ranged weapon. With DEFLECT ARROWS you can deflect both arrows.
DR and other resistances are explictly mentioned in Manyshot description as applying to each arrow. However, IMO, this vary fact supports my interpretation that otherwise the Manyshot salvo should be regarded as a single shot.Well... since noone here would probably argue the point that against DR Manyshot salvos do count as several hits (otherwise no archer would ever have a problem again with DR monsters), I vote for +1d6 for every arrow.
DR and other resistances are explictly mentioned in Manyshot description as applying to each arrow. However, IMO, this vary fact supports my interpretation that otherwise the Manyshot salvo should be regarded as a single shot.