Thats an symbol/character (Hex Symbol)
Normally, I know the only mp3 files which you have downloaded somewhere.
And normally is the symbol " in the name of files not allowed in Windows.^^
Example:
%28 = (
%29 = )
%20 = Space
%26 = &
%7D = }
%7B = {
etc......
U understand ?
*EDIT* The symbol is this:
%22 = "
List for more Codes:
http://www.ascii.cl/
*EDIT2*
Ahh. I understand ur problem. I have test it. When im in a Musicfolder and the click over the Tracklist on last.fm then make subsonic this symbols to searchfield. I mean thats an Bug. I have same problem.
Anyone have an Bug Fix?
The Problem are the Symbols of Subsonic. He copy Symbols to last.fm.
Look here:
h**p://ww*w.last.fm/music/?q=%22B%C3%B6hse+Onkelz%22+%22Dopamin%22&m=albums
Thats the direct link to last.fm from an Album from me.
Sindre can helps?