I have a few tracks that have an ID3 version 2 tag in them, and which specifies the name of the artist and the track name. However, the album name is left blank. This causes an error on the /usr/local/otto/bin/otto load that complains about the ablum name being null, and then stops the loading of subsequent tracks.
Not too much of an issue, as this was remedied by adding the album names to the few tracks that didn't have it, but is irritating.
If you only have a few songs with ID3 tags set "UseID3Tags" to false in otto.conf, so filenames and directory structure are used. No offense, but I don't think this is otto's fault.