Opera has tied up with yahoo and made yahoo theri default search engine.
And Yahoo cannot make itself the default search engine without the consent of the user, none of the browsers let any search engine become default on its own.
Ya if you installed the Yahoo! version of IE7, then it is ofcourse going to be the default search engine.
And if the user misses the "yes, make yahoo my default search engine", its none of yahoo's fault. Users hardly ever pay attention to whats being asked while installing softwares!!!
http://operawatch.com/news/2007/01/o...ith-yahoo.html