Seems to be an important notice on Ubuntu systems… automatic updates will remove the Sun-Java packages from Ubuntu versions 10.04+ soon…
https://lists.ubuntu.com/archives/ubuntu-security-announce/2011-December/001528.html
The plan from the Ubuntu folks is that the OpenJDK/JRE packages will be the officially supported java implementation, although I seem to remember reading on this forum recently that Ignition isn’t exactly compatible… Sounds like Ignition users and developers will need to do a manual fetch of the Java packages direct from Oracle.