A problem with Java 7 put many of us who play games on Pogo.com out of commission. Thank goodness, it is resolved now, but here is the information on it, just in case a similar issue happens in the future.
Apple Addresses Java Security Issues For Safari & OS X
Apple recently released security updates for Mac OS X in order to address the various security vulnerabilities associated with Flash and Java.
Help! How Do I Update Java?
Not sure how to update Java in Firefox? We've got a step-by-step walk-through to make sure it's up-to-date and enabled.
Why Can’t I Use Java In Firefox?
Question: Why can I not play certain games in Firefox? It tells me to download Java, which I have done. I keep getting this message. - Bob Answer - Firefox has disabled the Java plug-in for the browser due to security issues with Java. But if you still wish to use Java to play games, here's how to do it.
Constructor – Build And Animate Models
Amanda's Cool Site: Constructor - a Java-based physics game that lets you construct and animate your own models.