This blog is updated daily..
A general description is here.
The use of .required by require/detach has been replaced by .Depends which is set from the 'Depends' field of a package (even in packages with name spaces). By default detach() prevents such dependencies from being detached in interactive use, and warns otherwise. [The default is intended to be changed before release.]
Placeholder.
Using with(), eval() etc with a list with some unnamed elements now works. (PR#14035)
intToUtf8() could fail when asked to produce 10Mb or more strings, something it was never intended to do: unfortunately Windows crashed R (other OSes reported a lack of resources). (PR#14068)
The HTML package index was not constructed properly when the library path was specified with backslashes. (Patch submitted by Gabor Grothendieck.)
Input from the Rgui console was changing the letter 255 (ÿÿ in Latin-2) in the character set to letter 1.