pop-up obscures bottom line

Selecting any line in Nautilus causes a pop-up to appear at the bottom of the window.
If any text is there, it will be obscured - see attachement.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: nautilus 1:3.4.2-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-38.61-generic 3.2.37
Uname: Linux 3.2.0-38-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.1
Architecture: amd64
Date: Sat Mar 2 11:52:01 2013
ExecutablePath: /usr/bin/nautilus
GsettingsChanges: org.gnome.nautilus.window-state geometry '873x946+1329+24'
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, user)
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
UpgradeStatus: Upgraded to precise on 2012-05-01 (304 days ago)