Absolutely.
It seems that the people at ubuntuask.com have a different (meaning "wrong") interpretation of the license.
It actually says not only that attribution is required, but that attribution is required in the manner specified by the author or licensor, which - on Stack Exchange - includes this:
So let me clarify what we mean by attribution. If you republish this content, we require that you:
- Visually indicate that the content is from Stack Overflow, Meta Stack Overflow, Server Fault, or Super User in some way. It doesn’t have to be obnoxious; a discreet text blurb is fine.
- Hyperlink directly to the original question on the source site (e.g., http://stackoverflow.com/questions/12345)
- Show the author names for every question and answer Hyperlink each author name directly back to their user profile page on the source site (e.g., http://stackoverflow.com/users/12345/username)
- Hyperlink each author name directly back to their user profile page on the source site (e.g., http://stackoverflow.com/users/12345/username)
(from http://blog.stackoverflow.com/2009/06/attribution-required/)
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