My prop stopped completely - probably due to the fact that we had just gone through to full power at the beginning of a go-round, so were indicating 60-65 knots.
kiwichick, care to expand a little? What type of plane, what type of engine? In our R2160 I regularly fly inverted (without an inverted flight system, so no fuel getting into the cylinders) at approximate those speeds, or a little faster, and my prop keeps windmilling.
Also, what was eventually determined to be the cause of your engine stoppage? Unless it was a catastrophic failure physically blocking the rotation, I would expect that at typical approach/go around speeds, an engine would remain windmilling even if there's no fuel at all going into the cylinders.