I've also had this problem -- failure to refresh the list of apps (my most recent successful refresh date was 11 July). When I check Application Manager > Tools > Log it lists "osso-application-iinstaller 4.46. UI version 2" and will not clear. It's not possible for me to uninstall this app since it is required by fmradio, mediacenter, osso-ai, skype-ui, nokia-repository, and rhapsody. I have no idea how to fix this no-refresh bug. Other posts here suggest that osso-xterm (which I've downloaded) can be used to address the problem; if anyone can help me come up with a solution I'd be very grateful! It seems like a lot of N800 users are having the same problem.