It seems that Opera does not handle browser return code 304, and therefore showing a blank page. This was confirmed by a bug report at:http://my.opera.com/community/forums/topic.dml?id=676132
I have added tiny piece of detection, where the ajax refresh only works if the browser is anything other than Opera. This means that people using Opera (about 2%) will not enjoy an automatic refreshing shoutbox

This will be removed once Opera plugs the bug.




Some of the items are off by default.




