FYI: anyone interested in switching to Opera might want to wait until v9.01 or something.
While Opera 9 is supposed to pass the
Acid 2 Test, I was actually able to build a site
that doesn't work well at all on Opera 9
[and only Opera 9, even v8.5 works fine...]
Essentially it involves some pretty weird bugs with frames & basic http authentication.
However, this does mean that random other sites might also start to act weird if they
somehow trigger the same bug.
If you encounter a site with content that doesn't want to load, you might want to either
downgrade back to 8.5 or wait for a bug fix...