"Canon USA doesn't seem to have published an overall advisory like that found in Asia, but has published advisories on the product pages for certain of its cameras, stating that "reports of this malfunction have been rare in the United States", but that it will likewise repair cameras found to be suffering from the problem free of charge, whether still under warranty coverage or not. Customers are advised to call Canon Customer Support, or submit an email requesting support. Full instructions can be found by visiting the Canon USA support website, browsing to your specific camera, then click on the "service notices" link."
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Jeff, Here is Canon USA's position...
http://www.imaging-resource.com/NEWS/1128632808.html
"Canon USA doesn't seem to have published an overall advisory like that found in Asia, but has published advisories on the product pages for certain of its cameras, stating that "reports of this malfunction have been rare in the United States", but that it will likewise repair cameras found to be suffering from the problem free of charge, whether still under warranty coverage or not. Customers are advised to call Canon Customer Support, or submit an email requesting support. Full instructions can be found by visiting the Canon USA support website, browsing to your specific camera, then click on the "service notices" link."