Over on APUG, there is now a thread about B+W filters. All concern Bay-series I.II, or III. All seem to have been purchased from B&H. There seems to be a new method of construction--gluing the element in instead of using a retaining ring. Several users have reported that the element has popped out of the mount. I looked at mine, a Bay-III special ordered from B&H, and it really does have what looks like silicone bathtub caulking compound holding the filter element. There are front, internal threads, but no retaining ring. I am a little disconcerted after paying a lot of money for a B+W filter. Anybody know anything about this?