First, thanks for the replies. This sort of thing is frustrating and hard to diagnose at a distance, and any help is appreciated.
Here is some more background:
We have 3 9.2.4 databases using the following setup:
The subject says 9.2.3. Are you sure you're running 9.2.4 on all the servers? There was a fix to a bug related to starting a standby server from a filesystem snapshot. I don't think it was quite the case you have, but pretty close.
So this is delightfully embarrassing I just went back to double check and