After the installation of iTunes 4.5...I have had several song files on my iPod deleted or removed. I really don't know if they are being removed, but iTunes is displaying an exclamation point next to the track and the iPod will not play these songs when detached from iTunes. At first it seemed that entire albums were being erased, but now I have noticed that random songs are no longer available?!?!

Any ideas?!?!

mark