It would be nice to see if there is coming a notify from a source that is not included in the ACL. You now only see this in verbose mode:
Nov 29 15:53:04 ubuntu named[30052]: received control channel command 'reload bellgrim.se'
Nov 29 15:53:04 ubuntu named[30052]: zone bellgrim.se/IN: loaded serial 2011032124
Nov 29 15:53:04 ubuntu named[30052]: zone bellgrim.se/IN: sending notifies (serial 2011032124)
Nov 29 15:53:04 ubuntu ods-signerd: [socket] incoming udp message
Nov 29 15:53:04 ubuntu ods-signerd: [query] tsig ok
Nov 29 15:53:04 ubuntu ods-signerd: [query] incoming notify for zone bellgrim.se
Nov 29 15:53:04 ubuntu ods-signerd: [acl] no match
Nov 29 15:53:04 ubuntu ods-signerd: [query] refused
Nov 29 15:53:04 ubuntu ods-signerd: [socket] sending 165 bytes over udp
Nov 29 15:53:04 ubuntu ods-signerd: [dnshandler] netio dispatch
If you are running in normal mode, there would be nothing about this in the logs.