text: I went and had a look today, and according to the notice the stepping stones are "impassable".  What's actually happened is that water has nudged about one of the stones a few inches to one side.  I reckon someone with adult-sized legs could still get across without too many issues.  I'll update the eastern bit of the path when I do the rest of today's GPS traces.  I'll probably add a hazard tag to the stepping stones when I get to that.