still a issue:

Gtk-CRITICAL **: IA__gtk_assistant_set_page_header_image: assertion `child != NULL' failed at /usr/share/perl5/Debconf/FrontEnd/Gnome.pm line 27, <> line 1.
(Reading database ... 230698 files and directories currently installed.)
Preparing to replace samba4-common-bin 4.0.0~alpha15~git20110124.dfsg1-2ubuntu1 (using .../samba4-common-bin_4.0.0~alpha15~git20110124.dfsg1-2ubuntu1_all.deb) ...
Unpacking replacement samba4-common-bin ...
Setting up samba4-common-bin (4.0.0~alpha15~git20110124.dfsg1-2ubuntu1) ...
Setting up samba4 (4.0.0~alpha15~git20110124.dfsg1-2ubuntu1) ...
Gtk-CRITICAL **: IA__gtk_assistant_set_page_header_image: assertion `child != NULL' failed at /usr/share/perl5/Debconf/FrontEnd/Gnome.pm line 27.
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
ldb: unable to stat module /usr/lib/samba/ldb/modules/samba : No such file or directory
ldb: failed to initialise module /usr/lib/samba/ldb/modules/samba : Unavailable
ldb: failed to initialise module /usr/lib/samba/ldb/modules : Unavailable
WARNING: Module [samba_dsdb] not found - do you need to set LDB_MODULES_PATH?
Unable to load modules for /var/lib/samba/private/sam.ldb: Failed to load modules from: /usr/lib/samba/ldb

Traceback (most recent call last):
  File "/usr/share/samba/setup/upgradeprovision", line 1597, in <module>
    ldbs = get_ldbs(paths, creds, session, lp)
  File "/usr/lib/python2.7/dist-packages/samba/upgradehelpers.py", line 159, in get_ldbs
    ldbs.sam = SamDB(paths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:samba_dsdb"])
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 53, in __init__
    options=options)
  File "/usr/lib/python2.7/dist-packages/samba/__init__.py", line 110, in __init__
    self.connect(url, flags, options)
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 66, in connect
    options=options)
_ldb.LdbError: (80, 'Failed to load modules from: /usr/lib/samba/ldb\n')
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 1
No apport report written because MaxReports is reached already
                                                              Errors were encountered while processing:
 samba4
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
Setting up samba4 (4.0.0~alpha15~git20110124.dfsg1-2ubuntu1) ...
Gtk-CRITICAL **: IA__gtk_assistant_set_page_header_image: assertion `child != NULL' failed at /usr/share/perl5/Debconf/FrontEnd/Gnome.pm line 27.
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "max log size"
Ignoring unknown parameter "max log size"
Unknown parameter encountered: "syslog"
Ignoring unknown parameter "syslog"
Unknown parameter encountered: "passdb backend"
Ignoring unknown parameter "passdb backend"
Unknown parameter encountered: "unix password sync"
Ignoring unknown parameter "unix password sync"
Unknown parameter encountered: "passwd program"
Ignoring unknown parameter "passwd program"
Unknown parameter encountered: "pam password change"
Ignoring unknown parameter "pam password change"
Unknown parameter encountered: "map to guest"
Ignoring unknown parameter "map to guest"
Unknown parameter encountered: "usershare allow guests"
Ignoring unknown parameter "usershare allow guests"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
Unknown parameter encountered: "guest ok"
Ignoring unknown parameter "guest ok"
ldb: unable to stat module /usr/lib/samba/ldb/modules/samba : No such file or directory
ldb: failed to initialise module /usr/lib/samba/ldb/modules/samba : Unavailable
ldb: failed to initialise module /usr/lib/samba/ldb/modules : Unavailable
WARNING: Module [samba_dsdb] not found - do you need to set LDB_MODULES_PATH?
Unable to load modules for /var/lib/samba/private/sam.ldb: Failed to load modules from: /usr/lib/samba/ldb

Traceback (most recent call last):
  File "/usr/share/samba/setup/upgradeprovision", line 1597, in <module>
    ldbs = get_ldbs(paths, creds, session, lp)
  File "/usr/lib/python2.7/dist-packages/samba/upgradehelpers.py", line 159, in get_ldbs
    ldbs.sam = SamDB(paths.samdb, session_info=session, credentials=creds, lp=lp, options=["modules:samba_dsdb"])
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 53, in __init__
    options=options)
  File "/usr/lib/python2.7/dist-packages/samba/__init__.py", line 110, in __init__
    self.connect(url, flags, options)
  File "/usr/lib/python2.7/dist-packages/samba/samdb.py", line 66, in connect
    options=options)
_ldb.LdbError: (80, 'Failed to load modules from: /usr/lib/samba/ldb\n')
dpkg: error processing samba4 (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 samba4