I've had some time problems with my bootcamp installation. When boot in back in to Mac OS X after using my bootcamp partition the system time is +1 hour in Mac OS X.
This was quite annoying..
But after some searching I've found a solution on forums.macrumors.com.
Boot up your bootcamp partition and logon to your Windows instalaltion
Open Regedit with administrative rights
Create a new DWORD string value called
RealTimeIsUniversalin: HKEYLOCALMACHINE > SYSTEM > CurrentControlSet > Control > TimeZoneInformation
Control Panel -> Administrative tools -> Services(or "manage computer" and go to services) and select
apple time service. set this to
This will prevent Apple Time Service to "sync" the time on your Bootcamp partition an Mac OS X, wich it does poorly.