KCS firmware bugs

[twostar]

Another update after some more testing, this bug is even stranger than described above: The time toggles between reboots from being 12 hours out to being 0 hours out (with the 1-hour summer-time offset mentioned).  So:

• Reboot board, time is 12 hours out.
  
• Reboot board, time is 0 hours out.
  
• Reboot board, time is 12 hours out again.
  

This is with the local time zone set to UTC+12.

I can understand a fixed error, but one that toggles between the two is a bit difficult to explain.