A design that functioned correctly in 6.3i does not function in 7.1i. This affects the following families: XC9500, XC9500XL, XC9500XV, and CoolRunner XPLA3.
XC9500, XC9500XL, XC9500XV:
There is a bug in the program that creates the Jedec file (hprep6). This bug appears only on Windows platforms. It does not occur on Linux or Solaris operating systems. There is a logic error, and the outputs will appear to be inverted. Programming a device with this invalid Jedec file will NOT harm the device.
CoolRunner XPLA3:
A bug in the program creates the Jedec file (hprep6). This bug affects all operating systems. Programming a device with this invalid Jedec file will NOT harm the device.
This issue has been fixed in the latest 7.1i Service Pack available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jsp
The first service pack containing the fix is 7.1i Service Pack 2.