I've been sitting on this post for a few days waiting for it to play out. This morning it did: Really Right Stuff stepped up and said they'd replace the clamp on my ball head. A new one is shipping today. I'm going to repeat that -- Really Right Stuff is replacing the clamp on my ball head for free. Shipping both ways and all. See, it's been hardly a month since the first time it locked up, when the clamp's lever on my Really Right Stuff BH-55 Ball Head locked up again.