>>I really hated Opera a year ago, it was very unstable and many sites did not "behave" well within Opera. However, the new version is a totally revamped product. It's much better and faster, I have not found any site where it does not behave perfectly.
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>Did you try microsoft.com? :)

Many times. After Microsoft lost to EU, and had to pay a lot of money, they also quietly changed all their web pages where they had code a la "if opera".

Another thing is that Opera has a feature which makes it possible to let the webservers think that you use another type of browser.