This problem has been reported in the java.net plugin's forum:
To reproduce the problem:
- install JRE 6u10 - the next-generation Java Plug-in is the default
- open the Internet Explorer's Internet Options "Advanced" panel
- uncheck the following checkbox
Use JRE 1.6.0_10 for <applet> (requires restart)
- run an applet with an <object> tag, such as
The applet won't load.
However, the above steps works with the classic Java Plug-in.