package roundcube-core 0.5.1 dfsg-7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Ab]

While installing Zentyal: package roundcube-core 0.5.1 dfsg-7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

E: roundcube-core: subprocess installed post-installation script returned error exit status 1
E: roundcube: dependency problems - leaving unconfigured
E: ebox-webmail: dependency problems - leaving unconfigured
E: ebox-communication: dependency problems - leaving unconfigured
E: ebox-all: dependency problems - leaving unconfigured
E: zentyal-all: dependency problems - leaving unconfigured
E: zentyal-communication: dependency problems - leaving unconfigured

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: roundcube-core 0.5.1+dfsg-7
ProcVersionSignature: Ubuntu 2.6.38-10.46-generic-pae 2.6.38.7
Uname: Linux 2.6.38-10-generic-pae i686
NonfreeKernelModules: fglrx
Architecture: i386
Date: Thu Sep 1 15:04:52 2011
ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
PackageArchitecture: all
SourcePackage: roundcube
Title: package roundcube-core 0.5.1+dfsg-7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to natty on 2011-08-14 (18 days ago)