General Description:
Incorrect HDL is generated for DCM/PMCD usage. The signal between the DCM CLKDV port and the PMCD CLKA port is not connected properly.
This problem has been fixed in the latest 6.3i Service Pack available at:
http://support.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 6.3i Service Pack 1.