I'm not sure but I believe the number of notifications for network- manager correspond to the number of networks available. If there are three wifi networks in the vicinity, there seem to be three messages "Don't show this message again".
-- firefox shows three pop-up notifications per completed download https://bugs.launchpad.net/bugs/540630 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs