libnss-ldap + pam-ccreds core dump

Binary package hint: libnss-ldap

I'm trying to get a working setup with cached credentials based on https://help.ubuntu.com/community/PamCcredsHowto

Using Feisty 7.0.4:

Package: libnss-db Version: 2.2.3pre1-2
Package: libpam-ccreds Version: 4-1ubuntu1
Package: libnss-ldap Version: 251-7.4
Package: libpam-ldap Version: 180-1.7
Architecture: i386

Current pam configuration:
auth [success=done default=ignore] pam_unix.so nullok_secure try_first_pass
auth [authinfo_unavail=ignore success=1 default=2] pam_ldap.so use_first_pass
auth [default=done] pam_ccreds.so action=validate use_first_pass
auth [default=done] pam_ccreds.so action=store
auth [default=bad] pam_ccreds.so action=update
password sufficient pam_ldap.so
password required pam_unix.so nullok obscure min=4 max=8 md5
account sufficient pam_ldap.so
account required pam_unix.so
session required pam_unix.so
session required pam_mkhomedir.so skel=/etc/skel/
session optional pam_ldap.so
session optional pam_foreground.so

Current nsswitch.conf:
passwd: files ldap [NOTFOUND=return] db
group: files ldap [NOTFOUND=return] db
shadow: files ldap [NOTFOUND=return] db

hosts: files mdns4_minimal [NOTFOUND=return] dns mdns4
networks: files

protocols: db files
services: db files
ethers: db files
rpc: db files

netgroup: nis
automount: files ldap

When I su from a local user to a LDAP user (no matter if ldap is avaiable) I get a core dump:
seppo@desktop:~$ su sveldhuisen
Password:
id: ldap-nss.c:1368: do_init: Assertion `cfg->ldc_uris[__session.ls_current_uri] != ((void *)0)' failed.
Aborted (core dumped)