package libzlcore0.12 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/libzlcore.so.0.12.10', which is also in package libzlcore 0.12.10-1

[steveb001]

 removed application

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: libzlcore0.12 (not installed)
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Sep 7 13:30:16 2011
ErrorMessage: trying to overwrite '/usr/lib/libzlcore.so.0.12.10', which is also in package libzlcore 0.12.10-1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: fbreader
Title: package libzlcore0.12 (not installed) failed to install/upgrade: trying to overwrite '/usr/lib/libzlcore.so.0.12.10', which is also in package libzlcore 0.12.10-1
UpgradeStatus: No upgrade log present (probably fresh install)