My son currently is using a Fuji S2500 camera (which has been returned twice to the makers, due to defects, the last time coming back with a replacement lens). Anyway the latest problem is that the memory card (Fujifilm 8GB SD) is suffering from decreasing memory, in that when you take images, then delete, although the card is showing as empty, the space has not been freed up. When the card was first used with the camera, it had space for 1337 images at the highest setting when empty; this is now down to 576 when empty. Have tried reformatting card on the camera and also on my Nikon D90 without any effect.
Any ideas?