I will not use a browser that pushes only authorized search engines. When Opera 12.15 pulled their search engine stunt, I reverted back to Opera 12.14. I decided to wait and see what happens with the next version. Now I read that 12.16 hasn't corrected the problem. Bad move Opera! I'll hold out for a while, but I can't sit at 12.14 forever.

For me, this new "feature" is bad enough that I dropped back to the previous version (12.14).
Hope it's fixed in the next version...