On a Win 2000, with Hindi enabled as default locale, installed Merlin b75, run the HindiFullLookKeyBoardDemo.html(sent in the attachment herewith) after copying the IndicIM.jar into your JDK_HOME/jre/lib/ext directory.

Step 1: Untar the Bug.tar(in the attachment)
Step2: Copy the IndicIM.jar into your JDK_HOME/jre/lib/ext directory
Step3: Compile HindiFullLookKeyBoardDemo.java with workaround as suggested in bug ID 4459099 for JRE invocation in Win2000 hi_IN locale
Step 4: Run the HindiFullLookKeyBoardDemo.html using the appletviewer after giving policy permissions on win 2000 hi_IN locale.

The observation is that the Deveanagai glyphs are not getting rendered and after sometime java.lang.IllegalArgumentException is thrown.