How can I get LightDM to work on Ubuntu 12.04 LTS 64-bit?

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http://askubuntu.com – Is there a permanent fix for the looping login problem in LightDM? I recently installed Ubuntu 12.04 64-bit. LightDM won't work even though I haven't changed any options (background, etc.). It just throws another login screen at me if I log in. So I did the stuff you're supposed to. I reconfigured gdm from the terminal and used that to log in, and have been using gdm for ~3 months now. The thing is, I want LightDM back so I can change it to a desktop background I made. (I have no idea about customising GDM and really don't care.) (HowTos)