The Oteam has been flushing out Opera 6 to a degree I didn't know was possible. They've went after every last possible bug they could find. As you may know, Opera 6 was mostly a UI upgrade. There was a small bit, but not very noticable amount of work done on the interp and rendering engine in Opera 6.
After three years of beta testing Opera, I am to the point, where I can not find a single bug in Opera.
If you know of any UI, reproducible crash, or other "non page code" problem in the latest public beta [searchengineworld.com] (build 1066), please let me know in e or post here. This does not include any page display issues or rendering code issues. The test is if the problem can be created with no pages open, then it is the problem they are looking for. The way I understand it, the display/page rendering engine code is frozen until the next major release.