This issue occurs when an HTML file is open inside Project Navigator. HTML pages include Web pages or Fitter Reports. To resolve this issue, close the HTML window in Project Navigator when you enter East Asian language characters into the ISE Text Editor.
This problem has been fixed in the latest 9.2i Service Pack available at:
http://www.xilinx.com/xlnx/xil_sw_updates_home.jspThe first service pack containing the fix is 9.2i Service Pack 1.
On Windows Vista, use another text editor (such as Notepad) instead of ISE Text Editor to enter East Asian language.
Also see
(Xilinx Answer 29853) and
(Xilinx Answer 29307).