This blog is updated daily.
A general description is here.
‘round()’ and ‘signif()’ now longer tolerate wrong argument names,
notably in 1-argument calls; reported by Shane Mueller on R-devel
(mailing list).
Using some of the ‘tcltk’ widgets no longer crashes R on Windows.
‘regexpr(*, perl=TRUE)’ no longer returns incorrect positions into text containing characters outside of the Unicode Basic Multilingual Plane on Windows.