IE9: some applets throw NPE and page in IE9 browser reports "does not support java".

Bug description: The applet game Alchemy cant be loaded due to IE9 browser does not support java.
Testsuite name: Applet Compatibility
JDK/JRE tested: jrefb-6u22-rev-bin-b05-windows-i586-22_sep_2010.exe
OS/architecture: win7-ultimate-x86
Browser:IE9
Reproducible: Always
Reproducible on machine:
[If sometimes] Also reproducible on machine:
Is it a platform specific regression: N
[If yes] Is it a new platform support: N
[If yes] Regression relative to OS version:
Is it a Regression: Y
[If yes] Regression introduced in release/build: not sure
[If yes] Test result on FCS: See the actual result.

Test run log location: http://jsqalab.sfbay.sun.com/results/Evergreen/6u22/6u22b05-j4b/applet/win7-ultimate-i586-ie9/workdir/set1/enZylom_Alchemy.jtr
Test run result location:
http://jsqalab.sfbay.sun.com/results/Evergreen/6u22/6u22b05-j4b/applet/win7-ultimate-i586-ie9/workdir/set1/

Steps to reproduce:
1.Install test bundle jrefb-6u22-rev-bin-b05-windows-i586-22_sep_2010.exe from
http://jre.sfbay.sun.com/java/re/jdk/6u22/promoted/rev/b05/j4b/bundles/windows-i586/
to C:/Java/
2.Make java console is shown.
3.Browse to URL : http://www.en.zylom.com/game/91/alchemy.htm
4.Click 'Play' to start the game.

Actual behavior:
  The applet game cant be loaded due to IE9 browser does not support java. See picture Alchemy.jpg

Verify:
1.Same configuration/6u10 b33 : Fail
2.Same configuration/6u21 b11: Fail
3.Same configuration/6u22 b04: Fail
4.Same JRE, same OS/platform, IE 8 : Pass
5.Same JRE, same OS/platform, FF 3.6: Pass

The following cases also have same issue:
set1/usZylom_AlohaSolitaire.html
set1/usZylom_EgyptianPyramid.html
set1/usZylom_Fifteens.html