Adding to Aaron's exposition, clicking the app icon with the erroneous "waiting to install" status fails to launch said app. This happened once with gparted on a fresh Ubuntu 12.04 install.
Checking if reboot solves the problem... ** This bug is no longer a duplicate of bug 966189 Launcher tooltip says "Waiting to install" when application is actually installing ** Tags added: gpart unity ** Description changed: After installing IDLE (using Python-3.2) from the software center, the icon appears in my launcher, but when I mouse over it, it says "Waiting to install" Release: Ubuntu 12.04 LTS + + >> Clicking the icon also fails to launch the app. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/994690 Title: Launcher tooltip says "Waiting to install" when the application is already installed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/994690/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs