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[simoncn]

The high figure for Ripped > [Unknown] is consistent with the first track of almost all albums not being identified as having a RIP_DATE tag. Just one track in the album without this tag will cause the album to be listed under [unknown].

I think something has happened in your automated tagging that doesn't show up in your tagging program but is causing an issue with MinimServer. Have you checked the MinimServer log for warning messages?

If there aren't any log messages that seem to be relevant, please upload one of the "missing" files to my FTP server and I will look at how it is tagged. I will send you a PM with the server details.