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 2.2.1-0ubuntu1

[Adithya Ramesh]

While I was installing 12.04, power went off. I tried re-installing manually later and this is what is the problem.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libatk-adaptor-schemas (not installed)
ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13
Uname: Linux 3.0.0-15-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Tue May 1 10:31:28 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 2.2.1-0ubuntu1
ErrorMessage: trying to overwrite '/usr/share/glib-2.0/schemas/org.a11y.atspi.gschema.xml', which is also in package libatk-adaptor 2.2.1-0ubuntu1
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 2.2.1-0ubuntu1
UpgradeStatus: Upgraded to precise on 2012-04-30 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Adithya Ramesh (adithya-r)]

Any solutions to this?

[Luke Yelavich (themuso)]

Could anybody still affected by this bug please add my PPA,
ppa:themuso/ppa, and try updating your system? Please let me know
whether the proposed libatk-adaptor and libatk-adaptor-schemas packages
worked, or not.