package gdm 3.8.1.1-0ubuntu5~raring1 failed to install/upgrade: ErrorMessage: subprocess installed pre-removal script returned error exit status 1

Upgrading from Ubuntu GNOME 13.04 to 13.10 gave me this error. Although it seems like gdm ended up being installed, it did give me these weird errors during the upgrade.

ProblemType: Package
DistroRelease: Ubuntu 13.04
Package: gdm 3.8.1.1-0ubuntu5~raring1
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Sun Jun 30 23:27:02 2013
ErrorMessage: ErrorMessage: subprocess installed pre-removal script returned error exit status 1
MarkForUpload: True
SourcePackage: gdm
Title: package gdm 3.8.1.1-0ubuntu5~raring1 failed to install/upgrade: ErrorMessage: subprocess installed pre-removal script returned error exit status 1
UpgradeStatus: Upgraded to raring on 2013-07-01 (0 days ago)