I have a 4G 20g B&W LCD that is a replacement for my original iPod (of the same) originally purchased in August of '04. The clickwheel is not responding at all. I "thought" that when you received a replacement, the warranty would begin anew. After checking the serial number on Apple's support page, I guess I was wrong. Questions: Can anyone confirm that the warranty does not begin anew with a replacement iPod? Has anyone had clickwheel issues, and is there a fix? Thanks in advance!