Additional windows-alert window during AJU to 5.0u8b03

Steps to reproduce:

1. Install 5.0u7fcs.
2. Set UpdateServletURL to http://webwork.sfbay.sun.com:8081/update/1.5.0/map-1.5.0.xml
3. Open Java Control Panel -> Update.
4. Do manual update, it should update to 5.0u8b03. JRE should install fine. GTB/GDS should be offered (if not already installed on system).
5. After installation is finished, click Finish on jre-installation windows. Then click Ok on Java Control Panel. An additional windows-alert window is displayed.

Note: Step 1-5 above are for update from 5.0u7 -> 5.0u8. I repeated same steps except this time from 5.0u8 -> 5.0u9. I set my UpdateServlet URL to http://nanjing.east.sun.com/jupdate/map-1.5.0.xml for updating to 5.0u9.

I got same alert-window when I updated from 5.0u7 -> 5.0u8 and 5.0u8 -> 5.0u9.

Please see attached screenshot of additional windows-alert window.

There may be a case for having such an alert-windows e.g. registration of plugins, GTB installed in browser maybe. However, up to now, this window has never been seen and is not assumed to be normal or expected behaviour.