Nautilus contextual menu displays actions in disabled (grayed) even though they're active

[Hanine HAMZIOUI]

Nautilus contextual menu displays actions in disabled (grayed) even though they're active.
This bug appears once in a session. I can't tell yet what triggers it.

- Open nautilus.
- View extra pane.
- click on a file with the mouse's right button.
- Some actions like 'Copy to' or 'Move to' or 'Rename' are grayed, though, they are clickable and the action is executed.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: nautilus 1:3.4.0-0ubuntu2
ProcVersionSignature: Ubuntu 3.2.0-22.35-generic 3.2.14
Uname: Linux 3.2.0-22-generic x86_64
ApportVersion: 2.0-0ubuntu4
Architecture: amd64
Date: Sun Apr 8 11:59:01 2012
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: nautilus
UpgradeStatus: No upgrade log present (probably fresh install)