Sala Borsa is the new public library of Bologna (Italy). It has a relevant section of multimedia objects: more than 10.000 musical compact discs, 5.200 vhs and dvd. In particular, the musical section is strongly appreciated by users, with a great circulation of people and a lot of cd borrowed every day. This situation determines many problems for the library and the users themselves. The paper examines these problems and highlights new users' behaviours.