The relevant error is
---
Setting up lxdm (0.2.0~svn2307+git20100408-0ubuntu1) ...
dpkg (subprocess): unable to execute installed post-installation script: Exec format error
This is reported in bu 512096. It requires manual steps described in the master report to workaround the problem.
I'm marking this report as duplicate.
The relevant error is svn2307+ git20100408- 0ubuntu1) ...
---
Setting up lxdm (0.2.0~
dpkg (subprocess): unable to execute installed post-installation script: Exec format error
This is reported in bu 512096. It requires manual steps described in the master report to workaround the problem.
I'm marking this report as duplicate.
Thanks and don't hesitate to submit any new bug.