Just for the records, there is a second catch which Timur solved here: http://www.juce.com/comment/318838#comment-318838
If you set a deployment target 10.8, the compiler default is no longer C++11 but C++98. And if one is unlucky like me and tries to set deploy to 10.8 and select Compiler C++11, the library's compiler default is then STD++ with C++98, which makes no sense at all...
So be sure to set Compiler language always together with std setting. Compiler default is not what I would expect there.