General Description:
BitGen has been updated to fix several incorrect error and configuration settings for Virtex-4. Please update BitGen for Virtex-4 configuration.
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 3.