The Media Browser in iLifeSupport 8.1 may cause a noticeable lag in performance for some customers when they access iTunes music from the Media Browser in any iLife '08 application (iPhoto, iDVD, GarageBand, iWeb or iMovie).    

When you install either Jam Pack 1 or Jam Pack 2 on a new computer with GarageBand '08, some of the instruments may be missing. This may happen if you do not install the optional GarageBand content.