I can confirm too (on screenshot i'm trying to open nautilus that was previously closed, but nothing happens)...
** Attachment added: "Screenshot" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1303325/+attachment/4092093/+files/Screenshot%20from%202014-04-22%2009%3A24%3A01.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1303325 Title: clicking on its launcher icon doesn't open it (occured after closing app before) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1303325/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs