A couple further patches for the fsmonitor branch, which ideally I'd have noticed before my previous series landed.
In the first patch I believe I've found the underlying reason for the PWD confusion in the previous go-around -- but I'm not sure I'm wholly convinced about my solution to it. Specifically, it seems like this problem is likely more widespread than this one place, so adjusting it in the example hook may just be leaving the same dangerous edge for others to stumble across later. - Alex
