[Commons-l] CC by 3.0 not allowed on Commons?

Hi

I asked a photographer for permission to use pictures on Commons. I filled out the email permission template with the CC-by 3.0 license after having read this: http://creativecommons.org/licenses/by/2.5/

"A new version of this license is available. You should use it for new works, and you may want to relicense existing works under it"

After recieving the license I see that CC by 3.0 is not allowed on Commons. Can anyone explain this? http://commons.wikimedia.org/wiki/Template:Cc-by-3.0

I feel now very stupid to ask the photographer again for another permission in 2.5.

I strongly suggest either to accept CC by 3.0 or to ask to remove this misleading text we link to in hundred thousands of images.

Help appreciated.

Regards

Robin