When we operate our kitchen glide (3580RL) there is a small amount of vertical direction movement of the front edge of the cabinet right side evidenced by the seperation of the countertop and the backsplash of abount 1/4" to 3/8". No movement at completion of the glide operation, just during operation. No leaks, no cracks, nothing but a little movement. We noticed when we bought it that there was a seperation in the silicone and never paid it any thought. Anyone ever see this, might be just the flex of the glideout during movement. Thanks.