Here is a puzzle. A few days ago, my N900 got really slow, even after a reboot. Then, it seemed to have fixed itself, until I realized that some things were not quite right. For example:

- The phone application is not able to keep track of calls. It always displays "No recent calls".
- Same thing for the Conversations app. It just says "No conversations".
- The "Ringing tone" went back to the default, even though in Preferences/Profiles I had a different one selected. (This was corrected after reslecting it.)

As far as I can tell, everything else seems fine. I am able to make calls and to receive them. I am able to send SMS messages and to receive them. But, I can't, for example, save a new contact from a recent call, since none are visible.

Any ideas?

I do have a system backup from June (made with backupmenu), but I would hate to have to go back to that.