Java 6 update 12 has been released. Please install this update because it contains a fix (6745455) especially for Firefox extensions that use java like the openinfocard id selector. openinfocard users on MacOS still have to disable the plugin2 and use the dying OJI plugin (or stay with Firefox 2...); although that is not really satisfying... I hope that Apple will leap ahead soon from java 1.6u7 to 1.6u12.
Thank you SUN for fixing this.