I have just tested this properly on Ubuntu Dapper 6.06 LTS (fully updated). The MTU setting does not seem to stop the network from working correctly on NetworkManager 0.6.2.
-- Internet connection does not work if the MTU is set too high https://launchpad.net/bugs/18813 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
