Well, maybe this is the answer to the Security History thing. I don't bother checking Security Center settings much : I set them, I expect them to stay set. Not so, apparently. The update to 11.6 introduced some new features (Intrusion Protection? First time I'd seen it. Traffic Controller? That name has changed, from whatever it was).
It also reset the Firewall History settings, turning them off. How dumb is that?
I set it to log events again. Let's see if they start appearing in the Security History.
In my case the Security History appeared to be set up correctly but only scans are logged since 10/27. I reapplied the settings though to see if that makes a difference. Let us know if you see more complete logging. I have seen some blocked site notifications pop up the last week or so but I don't see then in the log. You have to wonder how well they QA these releases and whether other, more critical functionality, is not working.
Strange, in my case I see my security history stopped logging blocked suspicious incoming network connections since 27th October 2012, despite all the boxes being ticked in my 'Firewall History'.
I just checked : nothing yet. I think it's broken.
(I did just get a Buffer Overflow message after switching on Intrusion Protection though, and it duly shows in Security History. Never seen one of those before. I recall there were threads about those messages, so I'll add something to one of those threads.)
I still have the same behavior I reported in earlier posts. Only scans are logged in the Security History. Blocked Sites are being logged and filed in the Net Guard drawer. I have three there the most recent of which is dated 11/27.
From what we were told the fix is in 12.1 and may be put in 11.6 is enough users call support. 12.1 is available for new installs BUT not for most ISPs etc they seem to lag a version or 2.