I think that the problem lies in the matter how Opera handels the parts of Javas DLL.
I must (by regret) say that Opera isn`t the fastest browser on earth and neither "Simply the best internet experience " as they advertise.
M2 is one good thing, but it doesn`t have return receipt function which is vital for corporate usage.
It has a lot of bugs (from beta 3 to 7 at least 50 were corrected) but it still does not work correctly.
About speed: If You play honestly, Opera definetlly isn`t the fastest browser on earth. Why? Because you are forced to spoof UA all the time. The pages from principal offices work great in Netscape, but in Opera there are problems during every visit. I hate spoofing UA !
There is something to learn from Opera : mouse gestures for example.
I think that Opera has a long way to go to be there where Netscape is at the moment. It is so, that Netscape is the most reliable end user free browser on the scene at the moment.
UserAgent: Opera/7.20 (Windows NT 5.0; U) [en]
"We don't receive wisdom; we must discover it for ourselves after a journey that no one can take us or spare us." Marcel Proust.