This blog is updated daily.
A general description is here.
For some compiler versions, integer addition could accidentally overflow (without a warning). R's internal code should be more “robust” now, thanks to Hervé Pagès. (PR#15774)
‘type.convert()’, ‘read.table()’ and similar ‘read.*()’ functions get a new ‘exact’ argument, specifying how numeric input is converted when its conversion to double precision loses accuracy. The default ‘exact = FALSE’ allows accuracy loss, as in all R versions before 3.1.0.
The ‘"CRAN"’ filter (see ‘available.packages()’) no longer removes duplicates other than of packages on CRAN.