package libatk-adaptor-schemas (not installed) failed to install/upgrade: trying to overwrite '/usr/share/glib-2.0/schemas/org.a11y.atspi.gschema.xml', which is also in package libatk-adaptor 2.2.2-0ubuntu1

from the upgrade

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libatk-adaptor-schemas (not installed)
ProcVersionSignature: Ubuntu 3.0.0-19.32-generic 3.0.27
Uname: Linux 3.0.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Sun May 13 22:07:05 2012
DuplicateSignature:
 Unpacking libatk-adaptor-schemas (from .../libatk-adaptor-schemas_2.4.0-1ubuntu2_amd64.deb) ...
 dpkg: error processing /var/cache/apt/archives/libatk-adaptor-schemas_2.4.0-1ubuntu2_amd64.deb (--unpack):
  trying to overwrite '/usr/share/glib-2.0/schemas/org.a11y.atspi.gschema.xml', which is also in package libatk-adaptor 2.2.2-0ubuntu1
ErrorMessage: trying to overwrite '/usr/share/glib-2.0/schemas/org.a11y.atspi.gschema.xml', which is also in package libatk-adaptor 2.2.2-0ubuntu1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: at-spi2-atk
Title: package libatk-adaptor-schemas (not installed) failed to install/upgrade: trying to overwrite '/usr/share/glib-2.0/schemas/org.a11y.atspi.gschema.xml', which is also in package libatk-adaptor 2.2.2-0ubuntu1
UpgradeStatus: Upgraded to precise on 2012-05-14 (0 days ago)