 Several other producers received credits on the album, including Daniel Lanois, Brian Eno, Flood, Carl Glanville, and Nellee Hooper; Bono acknowledged that the involvement of multiple producers affected the record's "sonic cohesion".A demo version of the album (guitarist The Edge's copy) was stolen while the band were having their photo taken for a magazine in France in July 2004.It contained unfinished versions of several songs that made it onto the album.