"Safari attempted to access a secure website..." after 10.8.2

Question

I upgraded to 10.8.2 this afternoon and now my son's parental controled account is broken. Whenever he tries to access a web page via Safari (or Chrome) he gets a message stating "Safari attempted to access a secure website..." I haven't changed anything on his account - it worked fine before the upgrade, so I assume 10.8.2 caused the problem.
I do have Parental Controls on his account, but web browsing is set to Unlimitied Access.
Please Help!

Answer 1

Still experimenting, but I think I may have solved the problem. Try this:
Log out of the account with Parental Controls enabled.
Log into an account with administrative priveleges
Go to System Preferences | Parental Controls
Click the padlock and authenticate with the administrator's credentials
Click on the account with the Parental Controls enabled
Turn off Parental Controls for that account
Log out of the administrative account
Log in to the account that had Parental Controls enabled
Try browsing to see if any error messages appear (none should)
Log out of the account
Log back into the account with administrative priveleges
Follow the same process as earlier to find the account that should have Parental Controls enabled and enable restrictions accordingly; ensure under the Web tab that "Allow unrestricted access to websites" is enabled (if that's the setting you wish the account to have... which in my case, it is)
Log out of the administrative account
Log in to the account that has Parental Controls enabled
Try browsing to see if any error messages appear (none should)
This has worked for me on one of the six workstations I'm administering. I'll have the opportunity to test the remaining 5 in a few minutes.