the curser thumbnail when dragging in a mass

[zhaoqiang]

1, I click the eog's image.
2, Drag it out while I'm not release the button.
3, the dragging cursor thumbnail is in a mass.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: eog 3.12.2-0ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jun 23 23:59:47 2015
InstallationDate: Installed on 2015-04-13 (70 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: eog
UpgradeStatus: No upgrade log present (probably fresh install)