Both Joomla and Mambo suffer somewhat from duplicated content due to different URL's serving the same content. This is due to the legacy from the...
Don't know where you got that idea as development has never stopped on Mambo. Mambo was disrupted when the fork occurred, but has continued on as...
There is no such thing as the "best CMS" because it all depends what kind of site you have and what you want to do with it. Drupal is fantastic...
The official support forum for Mambo is at: http://forum.mambo-foundation.org You can download the Mambo CMS from the project's download site...
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