Czuch: I have read the Firefox Forums on the subject. The version you are talking about when released was only to patch a couple of security issues. They do state that they will be discontinuing updates for this, and any users should update to Firefox 3
Snoopy: Strange..... one of my kids uses Realarcade and has had no problems. Are you sure it's not your anti virus or firewall picking up something naughty in the code?