A gravity-feed dispenser includes an internal blocker assembly to prevent folded sheet from falling away from the dispensing aperture. A preferred embodiment includes a spring biased blocker arm which cooperates with a spring biased guide plate to maintain the napkins in position throughout dispensing of the stack, especially when the stack is depleted and of insufficient weight to urge the remaining sheets into position. In a preferred embodiment, the dispenser is provided with a convertible support, suitable for mounting the dispenser on either a wall or a countertop with a quick release mounting bracket.