Oracle has issued a new version of Oracle (Sun) Java JRE: 6u26. This contains security fixes: http://www.oracle.com/technetwork/ja...es-401875.html
Because it's a security update, I expect that it'll be updated in the Ubuntu repo's as well. I advise to wait for that.
For experienced Linux users who (for whatever reason) do not wish to wait for the regular updates: I've updated my how-to for manual installation of Java: http://sites.google.com/site/easylinuxtipsproject/java