If you are intending to get this camera or have got this camera,I would make sure you check that it isn't one which is affected:
http://www.dpreview.com/news/2012/07...-650d-T4i-grip
You can check if your camera is affected by entering the serial number in this link:
http://web.canon.jp/imaging/eosd/ser...-650d-t4i.html
Edit!!
Affected serial numbers are here:
http://www.digitaltrends.com/photogr...s-to-its-dslr/