Hmm Ubuntu 11.04 in a VM (fresh install) running Opera 11.64 so maybe an update is needed or maybe a corrupt user profile, I've seen this happen in Firefox..
I even tested it on the a page with the other graphs worked fine...
Semi-retired from Free-DC...
I have some time to help.....
I need a new laptop,but who needs a laptop when you have a phone...
Now to remember my old computer specs..