marius, could you install the -dbgsym packages for network-manager libnm-util0 and libnm-glib0 and network-manager-pptp and then get the same backtrace you posted?
marius, could you install the -dbgsym packages for network-manager libnm-util0 and libnm-glib0 and network- manager- pptp and then get the same backtrace you posted?