I am seeing this too after upgrading to 14.04, for example click on Files, close the window, and clicking on Files then does nothing. Right click > Open New Window still works. Seems to be a rather serious bug, I wonder why more are not seeing it. Perhaps it is an upgrade issue.
** Changed in: unity (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1291362 Title: Apps locked to launcher only launch once per session. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1291362/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs