Yes. That happened because you are using index.md for your section and Hugo 0.32 converts your section into a leaf bundle. You should use _index.md for your section list pages (or as Bjørn-Erik calls them branch bundles) and index.md for your single page (leaf) bundles. Try that and tell us if your section rendered like it used to.
The original poster has no index.md or _index.md in his sections. Something else is causing his problem.