This is a big question for me. Do we have to worry about eating diets that are "acidifying"- too much meat, not enough veg. Supposedly the body then has to pull calcium from the bones to buffer the blood.
Don is great and I appreciate his blog a lot, but I would defer to Stephan in almost every case. Plus... my inclination to believe that a carnivorous diet supplies all our necessary nutrients leads me to think that the acid/base "dilemma" is another never-no-mind.
I'm not yet convinced and don't worry about it too much. Less worry is always better. I certainly don't think that old intuit bones are the smoking gun. Readers might enjoy this post on the topic:
Edit: Here's another nice link on the topic. I'm still interested in this. I even got a chemistry lesson on acidity from my father in law. ;-)
Based on a bunch of reading I've done, combined with personal experience, I do believe that the concept of acid/base balance is valid.
However, remember that Paleo should not be a high-meat diet: it's a high-fat diet.
If you look at the list of acid/base balance at this page, you'll see that carbs actually present a high acid load, while fats such as cream do not. So, if you simply replace carbs with fat, you will be more alkaline than you would be otherwise.
For me, I've found that maintaining a decent amount of low-carb veggies in my diet, to balance the meat, seems to work great. The more extreme approach, using fruit, isn't needed.