Two things bothered and confused me though. Whilst we admittedly had focussed our attention on getting the Sun/Oracle Java plugin working first and foremost (since they are the primary Java authors and hence provide the point of reference), I was fairly sure we had done some testing with OpenJDK/IcedTea. In fact I even had the vaguest recollection of having tested it myself! Odder still the failure I received on 64bit Ubuntu was not the same as the error that enzolatina received! On my system the plugin wasn't even detected by Opera so it couldn't even get to the stage of crashing.
Having now investigated this a little further I realise things are a lot more messy than they initially appeared. In fact I would now go so far as to suggest (Ubuntu) users drop IcedTea as their Java browser plugin of choice (for now at least) and I am beginning to wonder if we should put the effort in to get it working before Opera *nix hits its first Evenes final! This is despite the fact that IcedTea is the default Java plugin on Ubuntu 10.04 and the Oracle/Sun Plugin is only available after a user manually adds the partner repository or downloads directly from the Java website. Hence many new Ubuntu users would never even think to install anything other than IcedTea.