If that’s what’s causing it, then the gitk interface seems to be rather misleading. I see lines indicating that the firecracker commit (etc.) is a direct ancestor of the commit tagged as 0.3, which is where digging sticks were added. Heck, I haven’t even seen digging sticks in the version I downloaded, which has a changelog in the data directory (that was only added in 0.3, right?).
…a changelog which references the digging sticks…
Okay, new hypothesis: I grabbed some weird in-between version due to some timing coincidence.