nss_ldap segmentation fault with RC1

Hello,

I set up ldap authentication against (MS)AD-Server and see segmentation 
faults of `id user-xy` for example.
The strange thing is that if I fire id for the first time it works, but 
then it segfaults. The cause is the following line in /etc/nsswitch.conf: 
"group: file ldap". As soon as I add ldap I can't su anymore because 
nss_ldap.so seems to crash. If I remove the group ldap directive (and 
leave shells and passwd with ldap) everything is working fine again.
How can I provide useful info to get this fixed?

Thanks,

-Harry