Log error:- conflicting album tag value

[Budgie]

Hi Simon,
I regret to say I still have not been able to sort out any of the albums for which minimserver log reports "conflicting album tag value". I deleted all the .mcache files and restarted minimserver but the new log shows the same problem albums/files even the ones which I have re edited using puddletag.

Should I increase minimserver logging level and could you help me dig deeper please?
It appears that all my files which I have tag edited with Easytag have this problem even after I have corrected the undocumented delimiter problem. There is a short thread on flac-request@xiph.org which considers both tagging and ripping as possible culprits but I have used several rippers over the years so have no ideas other than doing a few tests and documenting every stage. Any further advice would be appreciated.
Many thanks.
Budgie