Pace are just up the road from me, so we inevitably have a lot of their frames in the neighbourhood. I could be riding out on Sunday with as many as a dozen or more of my m8s on them, when they were "the" bike to have. A lot of these broken over time, right chainstay behind Bottom Bracket and under head tube/down tube join. There have been a fair few reports on here too.
I have many friends who own cycle shops in the area and they see a fair few of these too. It's not a factor common to just Pace frames, in particular, many HT Aluminium frames suffer the same fate, which is why steel is making a big comeback. (Hurrah!