Album art creation fails under Win32 if metadata has ':' or linefeed char
As noticed in: http://forum.videolan.org/viewtopic.php?f=14&t=93740
If media file has a metadata with e.g. ':' or linefeed chars, VLC cannot create album art for that file under Win32, because VLC tries to store art to folder with ':' or linefeed char in folder name. Windows doesn't allow ':' or linefeed in folder names so folder creation fails.
More problematic chars can be found from: http://msdn.microsoft.com/en-us/library/aa368590%28v=vs.85%29.aspx