Canon A40 sometimes pauses when asked to take a picture... Press the button in part way, as usual, then fully depress to take the shot and nothing happens.... for anything between 2~5 seconds and then the picture is taken - of the floor or of my hand as I tried and work out why nothing was happening. Happens about 25% of the time on average. On rare occassions it refuses to take a picture at all and I have to turn the camera off and back on. Anyone else experienced or heard of this? Camera is ~9 months old and I'm fairly sure has always done it - which I previously put down to a RTFM issue.