Dave - try Irfanview for checking the camera's shutter count. It's free - http://www.irfanview.com/.
Shutter count is called 'Total Pictures' in Irfanview. You'll find it in Image menu/Information/Exif Info button - scroll down to the 9th item from the bottom (8th item not counting the line 'Thumbnail:').
Thanks, will see what it comes up with