Do your headphones become intermittently unresponsive, does the volume randomly increase or decrease, or do you get random voice feedback? If so, your headphones have likely been recalled by Apple.
3rd generation iPod Shuffle’s with the serial number range of xx909xxxxxx to xx952xxxxxx and
xx001xxxxxx to xx004xxxxxx
“Apple has determined that the Apple Headphones with Remote included with the iPod shuffle (3rd gen) may fail under certain conditions. A very small percentage of iPod shuffle owners have experienced this issue. These headphones were included with the iPod shuffle (3rd generation) made between approximately February 2009 and February 2010.”
Article Via 9 to 5 Mac