Despite the thick haze covering S.E Asia again I thought I'd try a few shots yesterday evening. Unfortunately, Mr D60 refused to cooperate, this time the autofocus would do anything but. I tried 3 different lenses all of which would not focus properly, the camera was constantly hunting or settling on a focus that was completely wrong resulting in nothing more than blurred images. Contrast and background light were sufficient for the autofocus system to perform.
Canon checked the camera and found the same fault. By trial and error they found that by switching from AI Servo to Single Frame shot, taking a few pictures, and then returning to AI Servo the autofocus system suddenly performed correctly again. All camera components were found to be fine so this is a new enigma, at least for Canon Singapore. The matter has been referred to Canon, Japan where the next firmware update may include a correction for this anomaly.
So if this should happen to any other D60 owners, before embarking on a possible long trip to Canon please try out the above first.
Hope this helps.