Well.... good question. I am looking at the log and don't think that every time that set of lines appears I have rebooted. I've rebooted maybe 3 times in the last two days but that set of lines has appeared many more times than that.
Also, is it significant that "creating new database" and "scanning media" appear only once each in the log, apparently back at the factory?
Update: Just to check, I did a system reboot (from dashboard) and the following entries appeared in the upnp-av.log (note, yes, I had an abba folder on my media share along with many other music folders; it just happened to be the first alphabetically). I've since deleted both it and the "hilarys pictures" folder from the c:\media share, and moved them along with all my other files/folders into individual shares (pictures, music, videos), but the readyNAS is still looking for those two in their original locations, and doesn't see anything in the new shares. What does it take to get the readynas to rescan the data?
[2012/02/12 17:41:03] minidlna.c:153: warn: received signal 15, good-bye
[2012/02/12 17:47:07] minidlna.c:894: warn: Starting ReadyDLNA version 220.127.116.11.
[2012/02/12 17:47:07] inotify.c:89: error: inotify_add_watch(/c/media/Music/ABBA) [No such file or directory]
[2012/02/12 17:47:07] minidlna.c:985: warn: HTTP listening on port 8200
[2012/02/12 17:47:07] minidlna.c:997: warn: TiVo support is enabled.
[2012/02/12 17:47:07] inotify.c:89: error: inotify_add_watch(/c/media/Pictures/Hilarys pictures) [No such file or directory]