I went up to Kirkmichael on Friday to meet a heroic hiker from Oregon who had just completed the Rob Roy Way and Cateran Trail end-on. I hope to add to this update once I hear from him further, and then compile it into a proper update sheet for the guidebook, available to everyone. Meantime here is advance warning of some recent developments: note that (c) and (d) affect only "other walks" (4.2 and 4.3) and not the main Trail.
a) the Log Cabin Hotel at Kirkmichael has closed (following a change of ownership last year) so it's also now unhelpful as a landmark (pp33, 57)
b) various derelict buildings have become renovated (e.g. on p39, 4th bullet)
c) the shieling photographed on p56 is no longer visible
d) the boat-house on Loch Beanie is no longer there (page 59, 1st bullet).
There's a really useful info pack that Blairgowrie TIC supplies, including lists for eating out, accommodation and a new colourful leaflet with map. They also give details of the
Blairgowrie & East Perthshire Walking Festival, which runs from 3 to 9 October.