Hi Pete,
Unfortunately (or fortunately depending on your viewpoint) the circuit is working fine today and there aren't any packet losses showing on either MP or PP. I'm using the default packet size of 56 on each and both are using the default ICMP and not UDP.

Looking at the PP graph, it appears that there were quite a few lost packets on an intermediate router hop (hop 10 of 13) but none for routers on either side of that one. I suspect that router had ICMP set for low priority and was occasionally dropping packets to it.

The main difference between MP and PP appeared at the last hop where MP showed quite a few dropped packets and PP hardly any.

Don