Tested OS: XP-pro(sp2)
       Build: jre 1.5.0_10 b02
       Browser: Internet Explorer 6.0

Steps to reproduce:
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1) Install jre 1.5.0_10 b02 on the test system
2) Using Internet Explorer 6.0. browse the page:
   http://10.5.21.222/Stardom/Hmi/Run/TC50-01
3) Click 'Logon' on the left top frame
4) Click 'Logon' (leave 'User ID' and 'Password' fields blanked)
5) Click 'Graphics' on the left top frame
6) Under the [Graphic Index], click '*' on the left side of 'TC50-01-02'
7) Double click 'Button' button

IE browser is frozen/hung.
The java stack trace is attached.
This issues doesn't occur in Java SE 6- RC-b104.