I have a Soltek FRV/ XP 1800 with a 40gig HD partitioned into two 20's. I originally just had XP Pro on the system but I reformatted the second partition and installed Mandrake 9.0 for the first time.
When I boot into either OS the system time keeps changing.
I have checked the setting for both and the region is the same - Brisbane.
Right now i'm in XP and the time in the tray is correct - 5.30am. If I reboot into Linux, it will show 3.30. I think it was even the previous day.