My 6 month old 50D shutter button stopped working much to my disappointment. (I reckon about 20,000 shots) Searching online it seems to be a common problem - not good. So posted my camera back to the Canon Service Centre in Sydney & got it back in 9 days all repaired under warranty. Pretty good service I thought as postage & weekends would take about 5 days out of that. Still waiting for Aust post delivery receipt that Canon got it though!