On linux there is a plus one hour difference in the display of the calender view. However if you open the document ist shows the right time.
Even if you create a new calendar entry in the linux clients the document will hold the right time while the display will show +1 hour.
Both, server and client use the same timezone. It happens with SuSE9 and Mandrake 9.2 as client but I think it won't be limited to this versions (SuSE 7.2 is running on the server).
Harald Gaerttner