This issue is fixed in the latest 8.1i Service Pack, available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jspThe first service pack containing the fix is 8.1i Service Pack 1.
The following Device Families are supported by Leonardo synthesisAutomotive 9500XL, Automotive CoolRunner-II, Automotive Spartan-IIE, Automotive Spartan-3, CoolRunner XPLA3, CoolRunner-II CPLDs, QPro Virtex Hi-Rel, QPro Virtex Rad-Hard, QPro Virtex-II Military, QPro Virtex-II Rad Tolerant, QPro Virtex-E Military, Spartan-II, Spartan-IIE, Spartan-3, Spartan-3E, Virtex, Virtex-II, Virtex-II Pro, Virtex-4, Virtex-E, XC9500 CPLDs, XC9500XV CPLDs.
The following Device Families are supported by Precision synthesisCoolRunner XPLA3, CoolRunner-II CPLDs, QPro Virtex Hi-Rel, QPro Virtex Rad-Hard, QPro Virtex-II Military, QPro Virtex-II Rad Tolerant, QPro Virtex-E Military, Spartan-II, Spartan-IIE, Spartan-3, Spartan-3E, Virtex, Virtex-II, Virtex-II Pro, Virtex-4, Virtex-E, XC9500 CPLDs, XC9500XV CPLDs.
The following Device Families are supported by Synplify/Pro synthesisCoolRunner XPLA3, CoolRunner-II CPLDs, QPro Virtex Rad-Hard, QPro Virtex-II Military, Spartan-II, Spartan-IIE, Spartan-3, Spartan-3E, Virtex, Virtex-II, Virtex-II Pro, Virtex-4, Virtex-E, XC9500 CPLDs, XC9500XV CPLDs.