A photo posted by flickr user Jeff Croft shows that his iPhone has a sound icon on its ring/silent switch. According to an email Croft sent to Mac blogger John Gruber, the iPhone was purchased on June 29 in Lawrence, Kansas, so the icon is not a recent addition. Several other iPhone owners have commented on the photo, claiming their early-run units have sound icons as well, including one owner who provided a comparison shot of his iPhone, which has the icon, and his wife’s, which does not. This discovery follows several reports of iPhone users believing they have “broken” units, only to discover their lack of sound is due to the ring/silent switch being moved. Does your iPhone have a sound icon on the ring/silent switch? Let us know in the comments.