The notifications on my calendar are haywire. Quite frequently it will notify of a meeting an hour after the meeting was due to start and then again a few hours later. Sometimes it notifies me 3 or 4 times a minute about a meeting that finished hours ago. On one accasion it woke me up at 1.30 in the morning to tell me about a meeting the previous afternoon. I thought I would try disabling the notification and use an alternative calendar but when I go into the calendar app and press the menu button nothing happens. Any ideas?