STEPS TO FOLLOW TO REPRODUCE THE PROBLEM : 1. open the following url with java console open: http://sqeweb/jsn/users/fred/deployment_ws/fred/deployment_6_UR_int_ws/deployment/src/plugin/FunctionalTest/FunctionalTest/html/LinkStyleTest1.html EXPECTED VERSUS ACTUAL BEHAVIOR : EXPECTED - No exception will be printed in console and string "stylesheet has been got from style element" will be printed. ACTUAL - The following exception is printed: java.lang.ClassCastException: sun.plugin.dom.html.HTMLStyleElement cannot be cast to org.w3c.dom.stylesheets.LinkStyle at LinkStyleTest1.start(LinkStyleTest1.java:34) REPRODUCIBILITY : This bug can be reproduced always. The applet source code is: http://sqeweb/jsn/users/fred/deployment_ws/fred/deployment_6_UR_int_ws/deployment/src/plugin/FunctionalTest/FunctionalTest/src/LinkStyleTest1.java