We've heard various reports of Canon's S100 camera lens getting stuck in an extended position, and now Canon has confirmed that some models of the camera contain a defective internal lens part that can become suddenly disconnected. While that does sound dire, the camera maker has narrowed down the affected models to ones with serial numbers that begin with "29" to "41," or "29xxxxxxxxxx" to "41xxxxxxxxxx," and notes that this flaw manifests most often in hot or humid environments. Canon is offering free repairs to anyone with an S100 in the affected range, and is even offering to refund customers who might have paid to have this repair done before the announcement.