More information. The real problem is here (Debian unstable):
The following packages have unmet dependencies:
libgssapi-krb5-2 : Breaks: libgssapi-krb5-2:i386 (!= 1.10.1+dfsg-6) but 1.10.1+dfsg-5 is to be installed.
libgssapi-krb5-2:i386 : Breaks: libgssapi-krb5-2 (!= 1.10.1+dfsg-5) but 1.10.1+dfsg-6 is installed.
libkrb5-3 : Breaks: libkrb5-3:i386 (!= 1.10.1+dfsg-6) but 1.10.1+dfsg-5 is to be installed.
libkrb5-3:i386 : Breaks: libkrb5-3 (!= 1.10.1+dfsg-5) but 1.10.1+dfsg-6 is installed.
libkrb5support0 : Breaks: libkrb5support0:i386 (!= 1.10.1+dfsg-6) but 1.10.1+dfsg-5 is to be installed.
libkrb5support0:i386 : Breaks: libkrb5support0 (!= 1.10.1+dfsg-5) but 1.10.1+dfsg-6 is installed.
libk5crypto3 : Breaks: libk5crypto3:i386 (!= 1.10.1+dfsg-6) but 1.10.1+dfsg-5 is to be installed.
libk5crypto3:i386 : Breaks: libk5crypto3 (!= 1.10.1+dfsg-5) but 1.10.1+dfsg-6 is installed.