- Add identity.reflectX and identity.reflectY to d3.geoIdentity.
- Add zoom.interpolate to control zoom transition behavior.
- Allow double-click and double-tap zoom transitions to be disabled.
- Fix handling of a zoom.translateExtent smaller than the zoom.extent.
- Fix handling of zero-valued nodes in squarified treemaps.
- Fix parsing of unusual number formats in color specifications.
- Fix implementations of force.initialize to allow isolation.
- Fix d3.geoPath’s default projection and contex to be null, not undefined.
- Improve performance of d3.path.