Fact is, it would be cheaper for Opera to integrate permisevly licensed engine, than have to do all the extensive testing themselves and thus employ people for the relatively small userbase they have.

WebKit, which powers both Apple's Safari and Google's Chrome, is the first browser engine to fully pass the Acid3 Web standards test Developers working on WebKit announced late last week that the ...

I'm coding for WebKit and Gecko first. I always include IE8-9 and Opera after I'm done with the main layout. And if Opera demands more after-care than IE9, I draw my conclusions... I think if you've ...