Parental controls will not open
I have an iMac with multiple users set up. One of the users has Parental Controls turned on. I went to edit the Parental Controls the other day, and found that the preference pane will not open. It simply says "loading parental controls" and never actually loads. If I click the Open Parental Controls button again the System Preferences crashes.
iMac 11,2
Snow Leopard 10.6.8
I tried creating a new admin user, but that does the same thing. I've rebooted many times, and also deleted the "~/Library/Preferences/com.apple.systempreferences.plist" file, but that didn't work either. I've even tried backing up and deleting the "/Library/Preferences/.GlobalPreferences.plist" file, to no avail. Any suggestions will be appreciated.
iMac, Mac OS X (10.6.8)