Canon recently announced that some owners of the Canon PowerShot S100 compact camera could be eligible for a free repair. The S100 lens can occasionally stick when extended — an error that Canon says is due to a part getting disconnected within the lens. Humidity and heat can exacerbate the problem.
Owners of the product within the serial number range:”29xxxxxxxxxx”, “30xxxxxxxxxx”…”41xxxxxxxxxx” are eligible for free repair, regardless of warranty status.
More info on the Canon USA website.