How to fix Firefox 3.6 issue with applets?

After upgrading firefox from 3.5.8 to 3.6 we started seeing the issues with opening the applets. The issue is with JDK 6 Update 10. The simplest solution is close all the browser instances and install JDK 6 Update 18. This new install of JDK or JRE will solve the issue with applets in firefox.