Stefan, My platform is OSX 10.9.2 on a MacBook Pro (s/n 760460LDATM).
I must say that I installed the client over an old one that I used with ApacheDS 1.5.5. With not being able to change, I see the fields disabled (greyed out, including the labels), but the labels of Kerberos Real, KDC Host and KDC Port aren't. I will check the stack trace, and inform you shortly. Regards, Pierre Smits *ORRTIZ.COM <http://www.orrtiz.com>* Services & Solutions for Cloud- Based Manufacturing, Professional Services and Retail & Trade http://www.orrtiz.com