eMeRyTime to tell us a bit about your hardware

What desktop are you running KDE GNOME etc, you are running pclos2010 ?
Have you done a comparison with Firefox how do you feel they compare.
I have other problems but to me this Opera version seems to be in the overtaking lane most of the time, until the radiator goes on the boil and scares me because I have twin engine system running 65% load and above when hardly any apllications. This problem seem to be related to plugins, that is why I asked you to turn it off. Back to you
If you don't know how to give details load a very small program called
hardinfo, should be in Synaptic, it is a ripper, easy to generate reports, start with a summary and post this here. If you don't understand ask again
menotuIt seems fine to start with, but keep and eye on cpu loading, if you have a monster machine you may not notice until steam comes out of the cover and the mouse pointer starts disappearing

So far I seem to have found out that the problem only exists when plugins are
on since turning those off I have been running for hours without the problem showing up. Almost invariably in my case dbus-dameon gets in a knot and will not go away until re-boot, sometimes logout/in will be enough.
GeneralHere is a refence to the topic where I leave details on the cpu load problem
http://www.pclinuxos.com/forum/index.php/topic,76943.0.html