@sorodoros: not sure how it happened, but yes, it's the tracker for cached images. Sounds like something happened while it was saving its state to disk, and is unable to reload itself now when starting up. I'll add some better handling of this condition.

@thelushlife: see my post a page or two ago, I'm working on a widget right now (shows number of unread messages for now). Should be in extras-devel some time this week-end if all goes well.