Yu should always use for the first 48 hours of an acute injury.
While this might have an "acute" onset. Runner's knee isn't an acute injury.
If you're on a low pain issue you should use heat whenever possible.
Ice should be reserved for acute instances or excruciating pain.
ICE not only stops inflammation it slows the metabolism of the cell. That is why it is used on an acute injury, to reduce the needed oxygen to the area and prevent further tissue damange.
IF you are talking about someone that NEEDS to recover, slowing down the metabolism of the cell is not what you want. He needs to speed the recovery so that he can get back on his feet.
There are schools of thoght that go in many many directions.
In my many many many miles of running, nothing has brought better repeated success then reserving ice for the acute stuff, contrast for sudden onset yet overuse injuries, and heat for general recovery.
Timing also has a lot to do with this.
ZEB, I fully respect your differing opinion, as I said there are many different schools of thought on this. Thats one of the beauties of Sports Med.
On the other hand, we probably shouldn't be debating an issue that will likely be resolved by getting a pair of running shoes and training properly.