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Description
see ZF-7667 - due to changes related to validating the Twitter Service's "big integer", the passed argument is now filtered using "_validInteger" in "Zend_Service_Twitter" - this, however, will return "0" everytime a screen name is submitted to this function. Thus, userShow() is not able to handle screen names as an argument anymore.
The same goes for "friendshipExists", where _validInteger won't let any screen name through. Shame on you, dev!