The Casson invariant conjecture

Let $(X,0)$ be the link of a hypersurface or complete intersection singularity, and let $a3$ be its integral homology-sphere link.

Casson invariant conjecture. The Casson invariant of $a3$ equals one-eighth the signature of the Milnor fiber.

This conjecture was described as a wildly optimistic assertion concerning links of hypersurface and complete intersection singularities. It is known for singularities of splice type, but the source does not establish it in full generality.