I created this arrow and attached it (by the tip) to a motion path, then added a flow path object. When it passes through the beginning of the lattice (see image below), it deforms incorrectly. Anyone know why? I suspect that it's because the front axis of the arrow isn't parallel to the curve tangent, but I don't know how to set it exactly parallel. If that's not the problem, or if someone knows how to align the arrow to the curve tangent correctly, I'd greatly appreciate it!
I also notice that the other end of the arrow deforms in the last few frames of the animation (heading towards the opposite end of the curve; see image below). I hope the two problems are related.