Fingerprint authentication broken in suse 12.2

Ok, opensuse 12.2 is out - great!

I installed it in parallel to my old 12.1 system and found some things that I couldn’t fix easily and that are showstoppers for me.
I will post them in separate threads, but begin with this one:

I have a Lenovo T510i notebook with fingerprint scanner and use it since 11.4 (major pain to set up) and 12.1 (worked more or less ootb).
With 12.2 it does not work anymore:

After the install the fingerprint sensor was not active.
Activating it with the yast module does not work. Error message is (in german) “PAM settings could not be written”
I helped myself by copying the pam config from my 12.1 version to 12.2 and that worked, but
After some time the PAM configuration was overwritten again (online update?)

Known problem? (didn’t see it here).
Anyone has a solution for this?
Anyone knows which part of the system might change PAM config despite it was manually altered by me?
Or in other words: what is the authoritative source of pam configuration in opensuse 12.2 if not /etc/pam.d?

For the record: this is the working /etc/pam.d/common-auth-pc (and the fprint line vanishes sometimes)

auth required pam_env.so
auth sufficient pam_fprint.so
auth optional pam_gnome_keyring.so
auth required pam_unix2.so

https://bugzilla.novell.com/show_bug.cgi?id=772948

Thanks, updated that bug with my findings:

removing file /etc/pam.d/gdb-fingerprint makes it work