  The intent of this short note is to provide context for and an independent
proof of the discovery of Klaus Kroencke that complex projective space with its
canonical Fubini--Study metric is dynamically unstable under Ricci flow in all
complex dimensions N>1. The unstable perturbation is not Kaehler. This provides
a counterexample to a well known conjecture widely attributed to Hamilton.
Moreover, it shows that the expected stability of the subspace of Kaehler
metrics under Ricci flow, another conjecture believed by several experts, needs
to be interpreted in a more nuanced way than some may have expected.
