When an instance of an application is already running, if you need to open another instance under unity, you have to MIDDLE click the launcher icon and not left click. This feature was introduced as a fix for bug 709707.
This is the expected behaviour of Unity. Hence, I am closing this bug. Thanks for taking time to eport the bug. But, in case you feel this must be re-opened, you are more than welcome to do so. ** Changed in: unity (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/766857 Title: Can't open nautilus when a file copying action is in progress -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs