Not sure how that issue is related to mine. I got the NSSwitch problem immediately after upgrading, but it disappeared just as quick.
My issue was the Pfsense kept sending multiple copies of the same lineAlso, I upgraded to the latest Beta as of 25th June and it's solved the problem and I'm back to 8MB log files again, so whatever the problem was has been fixed…...either that or maybe the old fix for repairing the broken Syslog where is breaks lines in two no longer works correctly as i've not applied it.
I've probably not got what the "multiple copies of the same lines" really mean in your syslog as this is particularly true for the "NSSWTICH" entries. Maybe your initial description has been a bit to abstract at least to me - a few lines from your syslog could have clarified it :).
Nevertheless, it seems unclear why your syslog problems have gone with 2.1 beta. If you're still interested in getting it solved, you'll probably have to send some representive parts of your multiple syslog entries.
Peter