That reminds, both the fall and the strap mention, of a recent incident... we were waiting to get some food while on vacation, I had my K20D hanging bandoleer-style and was holding my 3-year-old son.
Well, I love my Op/Tech Pro strap but discovered a problem... my son proceeded to grab the quick-release and release it, and the camera strap slid off my body (fortunately the friction of the neoprene slowed it down, as well as it being somewhat squeezed between my son and I) but regardless, the camera fell a good foot or two, landing on the metal screw-in hood on my Lester A Dine 105mm. No damage done but man! I was pretty startled, and made it very clear to my son that he shouldn't do that again.
Hooray for lens hoods! (I did just over 4,000 shots in a week, the camera very rarely was off or had a lens cap on it, the only filters were occasionally CPs, and all six lenses I brought had lens hoods on all the time they were in use.)
Of course, being a 3-year-old, I think he did do it once more later in the trip, but I was able catch it before it fell that time.
I guess that's the one advantage of the stock strap - but there's no way I'm going back to it, the Op/Tech is just way too nice.