How widespread are problems with the new iPod?

Are problems with the new fourth-generation iPod be more widespread than we thought? We mentioned a few weeks ago that some users were reporting problems with theirs (like weird static and hard drive sounds when you listen to music through the headphones jack), but at the time it seemed relatively isolated. Now iPodlounge says that in a survey (and it's admittedly not a very scientific poll) some 42% of readers complained of audio problems with their new iPod. Apple still hasn't officially owned up to any problem, though some (but not all) retailers are offering replacements for defective models.