Support Problem on my S3 - sometimes home button stops working

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http://androidforums.com – My Galaxy S3 seems to have developed a bit of an issue. Once or twice a day, when I take the phone out of my pocket and press the home button, the screen doesn't activate. The device appears potentially functional (i.e. blue notification light flashing) but nether the home or power buttons do anything. The only thing that works for me when this happens is to press the power button for approx ten seconds. This resets the device. Any ideas? (General)