Maybe an update to the existing bug report if its still open, in my case disabling PCRE didn't help. It is also still disabled in the final setup that is working in the test environment, so it may be part of the fix. I am running it in a jail with mod_sftp, pretty much everything else is disabled, its used to provide sftp on port 2222 for secure EDI using private/public key pairs.
I will be starting the 10.1-RELEASE-p4 updates to my production environment today, need to get the base system updated, then begin on the jails next week to get this update in production for confirmation that it remains stable under load.
I can then go back and try converting my test jail to a full machine, to see if as others stated the issue is only present in a jail. It unfortunately will be at least another week out until I have time to do it though.