Audiobook skips while playing

Just got my Clip 4Gb & really like it…but after about 90 minutes of playing a book from Netlibrary the player started giving static like skips/pops every few seconds.  I checked the playback on my old MP3 player and computer and no skips/pops.  Does anyone know if this a hardware or firmware problem?  Anyone else have this problem?

I’ve experienced that as well the one time I listened to a netlibrary book.  Most people don’t seem to have seen the problem.

Here is the link to the forum message I entered and the responses.

http://forums.sandisk.com/sansa/board/message?board.id=clip&message.id=8745#M8745 

I will try the new firmware and browse the string you sent - thanks!