In reply to Dave Williams:
> (In reply to vincentvega)
>
> Sorry but this'll probably not help you at all! I have a similar problem which has eventually been diagnosed as the onset of dropped arches, ie. flat feet. I use replacement insoles and generally live with the ache.
Bugger.
I developed the same issue with SLs over a year or so, and presumed it was down to the insoles or midsoles (if the boots have such a thing) wearing out, but never solved the problem as I moved to wearing winter boots or trail shoes instead. I sometimes get twinges of pain in my arches when running, so hopefully I'm not in line for something serious down there...