FWIW my 2011 8606 completed by my CPA doesn't have Part I completed. Part II is completed. Based on my reading of the instructions, I believe Part I should have been completed, but if my understanding is accurate, it doesn't change the tax calculation. I'll ask my CPA why they (their software more accurately) didn't complete Part I, but I'm not too concerned.
Ah, make the most of what we may yet spend, Before we too into the Dust descend; Dust into Dust, and under Dust, to lie; Sans Wine, sans Song, sans Singer, and -- sans End! ... Omar Khayyam