Yup. The title is strange but I don't know how to put it. Let's make it clear. I've used the new feature of deleting artist out of your library. Well, that worked. But when I take a look at the taste-o-meter and the 'music in common' it is like my old library is still the indicator. 'Cause The White Stripes was listed as an artist I had in common, but I deleted it out of my library.
This is a known issue, caused by limitations of the system that generates taste-o-meter readings. The staff are working on a better way of doing it, which should be ready within a few weeks :)
Returning deleted artists