Tested OS: Solaris 9, 10 (sparc and x86)
       Browser: FF 2.0
       Build: jre 6u10-b08

Problem: At the loading time, there is an exception of "java.lang.IllegalThreadStateException: forbid thread creation in disposed..." thrown on java console and thereafter the game applet is not loaded at all. The issue doesn't occur in the latest 6u4-b10.

Steps to reproduce:
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1) Browse http://www.gamehouse.com
2) Click "Online Games" tab on the top
3) Click "All Online Games" link on the left frame
4) Find the "Table Poker" game and click "Play Now!"

In 6u10-b08, applet is not loaded due to java.lang.IllegalThreadStateException... / java.lang.ThreadDeath...

Other games from gamehouse.com (Carribean Stud, Mad Jong, Vegas Blackjack...) appear to display the same problem.

Here's the complete error message from the Java console:

java.lang.IllegalThreadStateException: forbid thread creation in disposed TG at sun.plugin.security.ActivatorSecurityManager.checkAccess(Unknown Source) at java.lang.ThreadGroup.checkAccess(Unknown Source) at java.lang.Thread.init(Unknown Source) at java.lang.Thread.<init>(Unknown Source)