I ripped a several dozen albums this week. When I played a couple of them back through iTunes on my desktop, I noticed a lot of skipping and crackling. When I played one of the same albums back on my iPod I noticed no problems. Is it possible that my laptop is not playing .mp3 files correctly or is it more likely that the file was ripped poorly from a possibly scratched CD. I should note that several songs on each CD seemed to playback without problem.
Sure, a damaged CD will produce problems like that.
So will a dusty CD or DVD-ROM drive.
It's also not unusual for one media player to detect an error with an MP3 file, while another media player plays the song back without any noticeable data corruption.
One more thing - sometimes, the data corruption occurs while you're compressing a .WAV file down to MP3 format, but it can also happen even if you're ripping a song directly to .mp3 format from the audio CD, especially if you were doing something else at the same time. (ie. using any program that was accessing the hard drive while you were ripping the songs)