This blog is updated daily..
A general description is here.
All the results from hist() now use the nominal 'breaks' not those adjusted by the numeric 'fuzz": in recent versions the nominal 'breaks' were reported but the 'density' referred to the intervals used in the calculation -- which mattered very slightly for one of the extreme bins. (Based on a report by Martin Becker.)
If xy[z].coords (used internally by many graphics functions) are given a list as 'x', they now check that the list has suitable names and give a more informative error message. (PR#13936)
The MSI installer defaults to an all-user (per machine) install (by setting the ALLUSERS property to 1). This can be changed at installation, and ift can be built for a user-mode install (see MkRules.dist).