As I move between folders or as I move between mail/calendar/contacts/notes/etc. I receive a 'not responding' on the banner and there is a 30 to 40 second delay until the request is honored. What might cause this? I keep my folders small and remove unwanted mail regularly. No more than ten or twenty messages in there right now and still it does this. My contact list is about 100 people and I do make extensive use of my calendar but nothing that should tax the system.