goodnight gracie, I know this is trivial but why?

I know this is trivial but in System profiler in the syncservices log i find this, or variantys thereof:

2011-06-13 20:45:44:432|SyncServer|1994|110fd0|Server|Info| Goodnight, Gracie.

I think it a message when the mac goes into sleep mode. But why 'Goodnight Gracie' Apparently it was a catchprase used by George Burns at the end of his radio show, but does anyone know who or why it was included in this log message?

mike