my s410 has broken twice (once in warranty, one out...but they fixed it for free both times).
1st time the camera would not turn on with the CF card inserted.  they first said there was not a problem and sent it back.  is aid there was and they finally fixed it.  apparently it was a short somewhere in the CF contacts.
2nd problem was the little plastic piece that splits open to expose the lense would not open/close.  i was expecting to have to pay to get it fixed but they fixed it for free, even though i was ~3 months out of warranty.
first canon camera i've had issues with though, out of 3