Many of us have struggled with different versions of JAVA causing problems with Tridion and I recognise that the What is the newest version of Java 6 supported on Tridion 2011 SP1 HR1? question is very relevant and the answers will be very useful.
However, this seems like a very limited scope (possibly a good thing). Would the question be better as What versions of Java are supported and proven to work for Tridion 2011 SP1 HR1?. This would encourage answers listing all versions to be given- not just giving the latest version.
I guess someone could list all of the supported and proven versions in their answer, but I wonder if the question could be made more useful for future visitors.