Why there is an error message in Opera when trying to log into Twitter?

Osama Javaid October 20, 2011
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When I try to log in to Twitter with Opera I get this error:

“Expectation Failed

The expectation given in the Expect request-header field could not be met by this server.

The client sent
Expect: 100-continue
but we only allow the 100-continue expectation.”

Does anyone know what this means and how to fix it?

  1. Jay
    October 20, 2011 at 7:43 pm

    only opera sends those headers, do not use opera.
    or downgrade to version 10..if you are using 11
    thats what I read on a forum.