After posting the previous, I found a file that worked for me. In the wiki at the very end under Resources there is a link for Music Shield libraries that links to MusicPlayer.rar. This is version 1.8 and it worked for me playing mp3’s (Haven’t tried others yet.) It also worked fine under linux and Arduino IDE 1.0.5, I think because it used only the SD and SPI libraries that came with that version of the IDE. I removed FAT16 and newSPI and there were no references to newSDLib either, I believe these were what was giving me problems. I am somewhat happier now and will have to play some more before I can make better use of this shield.