After installing JavaFX 2.1-b12 promotion, a traditional java applet can not be loaded on Chrome/ Firefox

*** Tested Configurations:
- x86 XP(sp3)
- jre 6u30, 6u31
- fx runtime: 2.1-b12 promotion
- Browsers: Firefox 9.01, Chrome 17.0.963.x, IE 8



*** Steps to reproduce:
0) Uninstall all jre.javafx
1) Install jre 6u31-fcs
2) Using test browsers to load the following page
http://0-360.com/gallery.asp
and click on 'Java' to view any virtual tour

--> The applet loaded with any browser (IE, FF, GC)

3) Install javafx 2.1-b12 promotion

4) Repeat step #2
The applet loaded with IE browser- not with Firefox 9.x and Chrome 17.x