I had the same issue and had filed a duplicate bug (marked it as such). Mine seems to most often happen just after a reboot but isn't consistent. After an icon has been added to the launcher in the new session (starting an app typically) the problem goes away.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/772951 Title: Super + Numeric shortcuts don't always work -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
