Canon's left hand figured out what its right hand was doing, and a rep told me that the information I'd been given for my previous entry on the subject of cracked LCDs in the PowerShot SD series was outdated and, well, wrong. It turns out that if you contact a service center, they'll ask you to send the camera in--if there's no sign of impact damage in addition to the LCD issue, they'll repair it for free. Subject to the usual warranty caveats, of course.
They're also pretty miffed about the poor service complaints. So here's your chance to vent to someone who'll listen and perhaps do something: if you've had a Canon support rep treat you badly over this issue, drop us a line at firstname.lastname@example.org, and we'll pass on the comments.