I see these stains on products from many different studios. I think 30% of the LPs I purchase have this. Last one was from Matador records.
Not sure it's the same problem as the Music Matters, but I'll check that out since I have a few of those LPs that I haven't opened yet.
Not sure it's the same problem as the Music Matters, but I'll check that out since I have a few of those LPs that I haven't opened yet.