The changes that were made in passdb as stated in the release notes doesn't seem to be changed in the documentation accordingly.
What's worse is that now it isn't possible to specify multiple LDAP-urls for ldapsam to get failover if one server is down for example.
It seems that the parameter isn't correctly parsed and split up, causing an invalid server-url to be passed to the ldap-routines.
Specifying only one url withouts qoutes works.
Already fixed in SAMBA_3_0_23 and patch sent to the
Samba mailing list.