When I open a Finder window, all the file timestamps show the same hour, 19:08. The dates change, but the hour stays constant. This is also the case for time/dates shown in the Console.
The Clock on the top right shows the correct time.
A date
command in Terminal shows the correct time.
I have zapped my NVRAM and also replaced the on-board battery.
I am using a MacPro 1,1 with Mac OS X 10.7.5