After I installed leopard on my mac, my itunes, ichat, audium, skype, photobooth, world of warcraft, and safari are refusing to work. My Photoshop, and Microsoft Word work though. I tried installing the leopard version of safari to see if maybe the fact that the programs weren't up to date was the problem but that didn't do a thing. Does anyone know what's going on and what I could do to fix this problem? Thanks.