I also noticed it depends on file names (?!?!?!). I created 2 files with the names "1" and "2" and I had a Nautilus Script to compare selected files. The behavior was exactly as you described. I would select these two files and then right-click on them. As soon as I right-click the selection disappears. It worked on the other files though. So I renamed these files and it worked again.
BTW it is reproducible. Just create 2 files with names "1" and "2" in the same folder, Ctrl+click-select them and then right-click on the selection and there you go ......... -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/929363 Title: In 12.04 nautilus problem with shift/ctrl multiple file select and right click context menu Status in “nautilus” package in Ubuntu: Invalid Bug description: There is a problem when multiple selecting files with ctrl or shift and then release and right click to bring up context menu. As soon as you right click all your files are unselected again. Only way to process these files is to use the panel menu. Very annoying when you have painstakingly ctrl selected files to copy or move and then you right click and everything un-selects. This is regression, never had this issue in Ubuntu before. Thanks ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: nautilus 1:3.3.5-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-12.21-generic 3.2.2 Uname: Linux 3.2.0-12-generic x86_64 ApportVersion: 1.91-0ubuntu1 Architecture: amd64 Date: Thu Feb 9 09:17:36 2012 EcryptfsInUse: Yes InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1) SourcePackage: nautilus UpgradeStatus: Upgraded to precise on 2011-12-21 (49 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/929363/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp