Tested mine 580ex now, and it emits 4 vertical beams. Look like it's only 1? bulb, and that the ligth is broken into beams by the red plastik optics.
Thanks for reply.
Yes, there are 4 red vertical lines that I can see(when you point it, say to a white wall). However, if you actually look at the red emitter directly, I can see two red beams (red lights), one at the bottom, placed centrally and one at the top on the right side. So this leaves the top left side, which appears as if there is a light but it does not flash/emit. My concern is whether this should be another emitter.