I got a better shot...one that I thought, "Sweet, that's my blip for sure.", only to come home and realise that it was blurry.

This is not the first time that I've had the autofocus on my 35mm 1.8 decide to randomly not work. With headphones on I'm incapable of hearing that all-confirming "beep" to tell me that autofocus has been achieved. I'm not sure if it's a camera issue, but I figure it's the lens as my 18-105mm has never had this happen.

Not quite sure what to do.....perhaps a trip to Jessops, I shall have.