Cannot copy/paste files/directories anymore

I'm allowed to copy, and the paste action appears in the right-click menu, but pressing it does nothing.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: nautilus 1:3.10.1-0ubuntu9.1
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
CurrentDesktop: Unity
Date: Wed Jun 25 09:06:44 2014
GsettingsChanges:
 b'org.gnome.nautilus.list-view' b'default-visible-columns' b"['name', 'size', 'type', 'date_modified', 'RabbitVCS::age_column', 'RabbitVCS::author_column']"
 b'org.gnome.nautilus.list-view' b'use-tree-view' b'true'
 b'org.gnome.nautilus.list-view' b'default-column-order' b"['name', 'size', 'type', 'date_modified', 'owner', 'group', 'permissions', 'mime_type', 'where', 'RabbitVCS::age_column', 'RabbitVCS::author_column', 'RabbitVCS::revision_column', 'RabbitVCS::status_column', 'date_accessed']"
InstallationDate: Installed on 2013-08-15 (312 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: nautilus
UpgradeStatus: Upgraded to trusty on 2014-04-21 (64 days ago)