[olympia]

you can use an nfo file with the MusicBrainz link in it to workaround the issue (which is I think something to do with the MusicBrainz search or encoding issue - I might look at this later).

edit: this is actually a MusicBrainz thing:
This is the search URL the scraper uses in case of p!nk:
http://search.musicbrainz.org/ws/2/artis...rtist:p!nk
As being said, you can workaround this with the nfo file with the dircect link to the artist on MB.