The problem that I have is IDN (International Domain Name) UTF-8 string set in the Web Page's < a href=" I have create the test case reside in the http://ecotw101.com/test_href_idn.html There are 2 lines in the page content 1st line: htef using the Chinese character input string and just like the type into the browser URL , both will works (connet to HTTP server) 2nd line: href using the UTF-8 3bytes encoding for each character and after it send to Apache Server, it get the following err message " Server not found Firefox can't find the server at %e9%a3%9f%e7%89%a9%e5%85%8d%e8%b2%bb.%e6%85%88%e5%96%84%e7%b6%b2.net. " The test case works fine with the Chrome browser. Since the href content was generated from HTML editor or QR redirect program, it is UTF-8 format. Firefox use it for connect to Web Server and got error. Don't know how Chrome handle the case. I guess that Chrome might do a convert from UTF-8 to PunyCode of IDN. IE has the same problem. This problem will happen on the mobile smart phone after scan a QR code which use an IDN for redirecting the Web site. Thanks ! - Mike ---------------------------- ''code edited to get rid of the whole paragraph worth of hyperlink - ed''