Canon PowerShot S3 IS Advanced User's Manual page 11

Do not trigger the flash in close proximity to human or animal
eyes. Exposure to the intense light produced by the flash may
damage eyesight.
In particular, remain at least one meter (39 inches) away from
infants when using the flash.
Keep objects that are sensitive to magnetic fields (such as
credit cards) away from the speaker of the camera.
Such items may lose data or stop working.
When using the optional Canon Wide Converter, Tele
Converter, Close-up Lens, or Conversion Lens Adaptor, be
sure to attach them firmly.
If the lens becomes loose and falls off, it may crack, and the shards
of glass may lead to cuts.
Others
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