Controles parentales inundado sistema.registro con errores

Yo estaba cavando todo para la diversión, y mi system.log fue inundado con errores. Aquí está la salida de sudo cat system.log | tail -8:

Mar 19 15:33:06 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x34dd00 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:33:57 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x12a6d0 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:34:02 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x129b50 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:34:17 THE-COMPUTER Safari[155]: __CFServiceControllerBeginPBSLoadForLocalizations timed out while talking to pbs
Mar 19 15:34:29 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker saveData] [411:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x3451c0 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:34:37 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x3535d0 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:34:42 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x12bbb0 "The file "events.data" couldn't be opened because it isn't in the correct format."
Mar 19 15:35:56 THE-COMPUTER parentalcontrolsd[113]: -[ActivityTracker appDidLaunchOrBecomeFront:launched:] [1844:ezra] -- Got an error when saving MOC: Error Domain=NSCocoaErrorDomain Code=259 UserInfo=0x34aee0 "The file "events.data" couldn't be opened because it isn't in the correct format."

Estos parecen ser los mensajes de control Parental, pero ¿qué significan? También, están pasando todo el tiempo. Alguien podría arrojar algo de luz??