Yep, sorry, put 1.8j back on PC#2 (still with 1.8j on PC#1) and it lost connection after a couple of hours this time.

I can't imagine this explains it at all but will mention it anyway. The lost connection happened after I had been tabbing out of WoW and browsing Alakazham for quest info (NB: this is on the main PC, running 1.8j and 1 WoW client).
I managed a whole Ramparts run with no lost connection but played straight through, no tabbing out.
I release that my lost connections last week in BRD were also around when I was tabbing out to check routes to take etc.

I also realise that I'm tabbing/browsing on the main PC and it is the second PC which needs keyclone to be killed and restarted... however, thought I'd mention it anyway.