Fujifilm has published a “notice” (read: service advisory) informing users of its new 100MP mirrorless medium format GFX 100 that they may have a faulty shutter button. Fortunately, Fuji claims only “a very small percentage” of cameras are affected, and they’ll fix those cameras for free. The notice was published on the Fujifilm website yesterday, and it describes an issue with the locking mechanism of the side shutter button on the built-in battery grip. “Some users of the new FUJIFILM…