I got that problem and it obviously isn't the bellows: the leaking turns with th e holder for vertical or horizontal takes. It always occours in the upper right corner when holding the holder so you can read its name (here: fidelity elite). Looking through the flatheld opened holder directly into a halogen lamp I found out that there is really a hole in most of them at that place of the material th at should close them securely against sunlight. Is that the reason? I have some jpegs at hand for showing the actual effect. What can be doner against it? How c an Fidelity sell that stuff? The holders are as new (I actually bought them new) . Best of all: Fidelity DELUXE holders don't show that leak. Don't hesitate to h elp me please! Ralph