sorry, still not working. i've installed the version 0.7-0ubuntu1~nm1~intrepid1, but no change. The following versions are installed:

florian@qacha:~$ sudo apt-cache showpkg libnm-glib0
[sudo] password for florian: 
Package: libnm-glib0
Versions: 
0.7-0ubuntu1~nm1~intrepid1 (/var/lib/apt/lists/ppa.launchpad.net_network-manager_ubuntu_dists_intrepid_main_binary-i386_Packages) (/var/lib/dpkg/status)
 Description Language: 
                 File: /var/lib/apt/lists/ppa.launchpad.net_network-manager_ubuntu_dists_intrepid_main_binary-i386_Packages
                  MD5: ec3ac72d26a5bdcabc1ea341c1a9cd6c

0.7~~svn20081018t105859-0ubuntu1.8.10.1 (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_binary-i386_Packages)
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_i18n_Translation-de
                  MD5: e9142dd85b1ee9c156ade5efd7d0469c
 Description Language: 
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_binary-i386_Packages
                  MD5: e9142dd85b1ee9c156ade5efd7d0469c

0.7~~svn20081018t105859-0ubuntu1 (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_binary-i386_Packages)
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_i18n_Translation-de
                  MD5: e9142dd85b1ee9c156ade5efd7d0469c
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_i18n_Translation-de
                  MD5: e9142dd85b1ee9c156ade5efd7d0469c
 Description Language: 
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_binary-i386_Packages
                  MD5: e9142dd85b1ee9c156ade5efd7d0469c


Reverse Depends: 
  network-manager,libnm-glib0 0.7~~svn20080908
  libnm-glib-dev,libnm-glib0 0.7-0ubuntu1~nm1~intrepid1
  network-manager-gnome,libnm-glib0 0.7~~svn20080908
  gnome-main-menu,libnm-glib0 0.7~~svn20080908
  network-manager-vpnc,libnm-glib0 0.7~~svn20080908
  network-manager-openvpn,libnm-glib0 0.7~~svn20080908
  network-manager-pptp,libnm-glib0 0.7~~svn20080908
  network-manager-pptp,libnm-glib0 0.7~~svn20080908
  network-manager-gnome,libnm-glib0 0.7~~svn20080908
  network-manager,libnm-glib0 0.7~~svn20080908
  libnm-glib-dev,libnm-glib0 0.7~~svn20081018t105859-0ubuntu1.8.10.1
  packagekit,libnm-glib0 0.7~~svn20080908
  network-manager-vpnc,libnm-glib0 0.7~~svn20080908
  network-manager-pptp,libnm-glib0 0.7~~svn20080908
  network-manager-openvpn,libnm-glib0 0.7~~svn20080908
  krb5-auth-dialog,libnm-glib0
  gnome-main-menu,libnm-glib0 0.7~~svn20080908
  network-manager-gnome,libnm-glib0 0.7~~svn20080908
  network-manager,libnm-glib0 0.7~~svn20080908
  libnm-glib-dev,libnm-glib0 0.7~~svn20081018t105859-0ubuntu1
Dependencies: 
0.7-0ubuntu1~nm1~intrepid1 - libc6 (2 2.3.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libnm-util1 (2 0.7) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libuuid1 (2 1.05) 
0.7~~svn20081018t105859-0ubuntu1.8.10.1 - libc6 (2 2.3.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libnm-util0 (2 0.7~~svn20080908) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libuuid1 (2 1.05) 
0.7~~svn20081018t105859-0ubuntu1 - libc6 (2 2.3.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libnm-util0 (2 0.7~~svn20080908) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libuuid1 (2 1.05) 
Provides: 
0.7-0ubuntu1~nm1~intrepid1 - 
0.7~~svn20081018t105859-0ubuntu1.8.10.1 - 
0.7~~svn20081018t105859-0ubuntu1 - 
Reverse Provides: 

and:

florian@qacha:~$ sudo apt-cache showpkg network-manager
Package: network-manager
Versions: 
0.7-0ubuntu1~nm1~intrepid1 (/var/lib/apt/lists/ppa.launchpad.net_network-manager_ubuntu_dists_intrepid_main_binary-i386_Packages) (/var/lib/dpkg/status)
 Description Language: 
                 File: /var/lib/apt/lists/ppa.launchpad.net_network-manager_ubuntu_dists_intrepid_main_binary-i386_Packages
                  MD5: c9f4bf64e7c00bfe2bf876582d785b5a

0.7~~svn20081018t105859-0ubuntu1.8.10.1 (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_binary-i386_Packages)
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_i18n_Translation-de
                  MD5: e5d5666eb7761fe9937c997f7229a928
 Description Language: 
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_binary-i386_Packages
                  MD5: e5d5666eb7761fe9937c997f7229a928

0.7~~svn20081018t105859-0ubuntu1 (/var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_binary-i386_Packages)
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid-updates_main_i18n_Translation-de
                  MD5: e5d5666eb7761fe9937c997f7229a928
 Description Language: de
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_i18n_Translation-de
                  MD5: e5d5666eb7761fe9937c997f7229a928
 Description Language: 
                 File: /var/lib/apt/lists/de.archive.ubuntu.com_ubuntu_dists_intrepid_main_binary-i386_Packages
                  MD5: e5d5666eb7761fe9937c997f7229a928


Reverse Depends: 
  network-manager-kde,network-manager 0.6.2
  network-manager-gnome,network-manager 0.7~~svn20080928
  network-manager-kde,network-manager 0.6.2
  network-manager-gnome,network-manager 0.7~~svn20080928
  evolution,network-manager
  sugar,network-manager
  lxnm,network-manager
  kwlan,network-manager
  education-standalone,network-manager
  education-desktop-sugar,network-manager
  network-manager-kde,network-manager 0.6.2
  network-manager-gnome,network-manager 0.7~~svn20080928
  evolution,network-manager
Dependencies: 
0.7-0ubuntu1~nm1~intrepid1 - libc6 (2 2.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libhal1 (2 0.5.8.1) libnl1 (0 (null)) libnm-glib0 (2 0.7~~svn20080908) libnm-util1 (2 0.7) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libpolkit-dbus2 (2 0.7) libpolkit2 (2 0.7) libuuid1 (2 1.05) iproute (0 (null)) iputils-arping (0 (null)) lsb-base (2 2.0-6) wpasupplicant (2 0.6.1~) dbus (2 0.60) hal (2 0.5.7.1) update-notifier-common (0 (null)) network-manager-gnome (16 (null)) network-manager-kde (0 (null)) network-manager-pptp (3 0.7~~) network-manager-pptp (3 0.7~~) 
0.7~~svn20081018t105859-0ubuntu1.8.10.1 - libc6 (2 2.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libhal1 (2 0.5.8.1) libnl1 (0 (null)) libnm-glib0 (2 0.7~~svn20080908) libnm-util0 (2 0.7~~svn20080908) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libpolkit-dbus2 (2 0.7) libpolkit2 (2 0.7) libuuid1 (2 1.05) iproute (0 (null)) iputils-arping (0 (null)) lsb-base (2 2.0-6) wpasupplicant (2 0.6.1~) dbus (2 0.60) hal (2 0.5.7.1) update-notifier-common (0 (null)) network-manager-gnome (16 (null)) network-manager-kde (0 (null)) network-manager-pptp (3 0.7~~) network-manager-pptp (3 0.7~~) 
0.7~~svn20081018t105859-0ubuntu1 - libc6 (2 2.4) libdbus-1-3 (2 1.0.2) libdbus-glib-1-2 (2 0.74) libglib2.0-0 (2 2.16.0) libhal1 (2 0.5.8.1) libnl1 (0 (null)) libnm-glib0 (2 0.7~~svn20080908) libnm-util0 (2 0.7~~svn20080908) libnspr4-0d (2 1.8.0.10) libnss3-1d (2 3.12.0~1.9b1) libpolkit-dbus2 (2 0.7) libpolkit2 (2 0.7) libuuid1 (2 1.05) iproute (0 (null)) iputils-arping (0 (null)) lsb-base (2 2.0-6) wpasupplicant (2 0.6.1~) dbus (2 0.60) hal (2 0.5.7.1) update-notifier-common (0 (null)) network-manager-gnome (16 (null)) network-manager-kde (0 (null)) network-manager-pptp (3 0.7~~) network-manager-pptp (3 0.7~~) 
Provides: 
0.7-0ubuntu1~nm1~intrepid1 - 
0.7~~svn20081018t105859-0ubuntu1.8.10.1 - 
0.7~~svn20081018t105859-0ubuntu1 - 
Reverse Provides: