This blog is updated daily.
A general description is here.
Bundles of packages are defunct. [In progress: so far R CMD build cannot build them, and R CMD check refuses them.]
More functions now have an implicit (S4) generic definition.
File ~/.R/config is used in preference to ~/.Rconfig, and these are now documented in 'R Installation and Administration'.
New print() (S3) method for class "function", also used for auto-printing. Further, .Primitive functions now print and auto-print identically. The new method is based on code suggestions by Romain Franççois.
Assigning into a raw vector with an index vector containing NAs could cause a segfault. Reported by Hervéé Pagèès.
gregexpr() no longer segfaults when "" is given as the search pattern. Thanks to Hervéé Pagèès for the bug report.
CHAR() now returns (const char *) since CHARSXPs should no longer be modified in place. This change allows compilers to warn or error about improper modification. Thanks to Hervéé Pagèès for the suggestion.