In my application I've 2 applets which are communicating about references. This means each applet has a static member which holds itself (this). The each other applet can access this static member if it runs in the same virtual machine. This worked fine with JBOSS 2.4.0, but now I'm using JBOSS 3.0 and this doesn't work. The static member, which is set correct in the own applet, is always null if accessing it from another applet (without any changings in source code).