On a fresh install of Ubuntu GNOME 15.04, I did apt-get update and apt-get dist-upgrade, and the dialog popped up with this bug.
ProblemType: Package
DistroRelease: Ubuntu 15.04
Package: adwaita-icon-theme-full (not installed)
ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
Uname: Linux 3.16.0-28-generic x86_64
ApportVersion: 2.15-0ubuntu3
Architecture: amd64
Date: Tue Feb 3 21:46:21 2015
DuplicateSignature: package:adwaita-icon-theme-full:(not installed):trying to overwrite '/usr/share/icons/Adwaita/cursors/00008160000006810000408080010102', which is also in package gnome-themes-standard-data 3.12.0-1ubuntu1
ErrorMessage: trying to overwrite '/usr/share/icons/Adwaita/cursors/00008160000006810000408080010102', which is also in package gnome-themes-standard-data 3.12.0-1ubuntu1
InstallationDate: Installed on 2015-02-04 (0 days ago)
InstallationMedia: Ubuntu-GNOME 15.04 "Vivid Vervet" - Alpha amd64 (20141218)
SourcePackage: adwaita-icon-theme
Title: package adwaita-icon-theme-full (not installed) failed to install/upgrade: trying to overwrite '/usr/share/icons/Adwaita/cursors/00008160000006810000408080010102', which is also in package gnome-themes-standard-data 3.12.0-1ubuntu1
UpgradeStatus: No upgrade log present (probably fresh install)
Proposed fix: http:// people. collabora. com/~smcv/ adwaita- icon-theme_ 3.14.0- 2ubuntu7co1. diff