NEW FEATURES:

• iconv() now fixes up variant encoding names such as "utf8"
  case-insensitively.

DEPRECATED AND DEFUNCT:

• The legacy encoding = "MacRoman" is deprecated in pdf() and
  postscript(): support was incomplete in earlier versions of R.

BUG FIXES:

• Arguments are now properly forwarded to methods on S4 generics
  with ... in the middle of their formal arguments. This was broken
  for the case when a method introduced an argument but did not
  include ... in its own formals. Thanks to Herv'e Pag`es for the
  report PR#18538

• Some invalid file arguments to pictex(), postscript() and xfig()
  opened a file called NA rather than throw an error. These
  included postscript(NULL) (which some people expected to work
  like pdf(NULL)).

• Passing filename = NA to svg(), cairo_pdf(), cairo_ps() or the
  Cairo-based bitmap devices opened a file called NA: it now throws
  an error.

• quartz(file = NA) opened a file called NA, including when used as
  a Quartz-based bitmap device. It now gives an error.

• rank(<long vector>) now works, fixing PR#18617, thanks to Ilia
  Kats.

• seq.int() did not adequately check its length.out argument.

• match(<POSIXct>, .) is correct again for differing time zones,
  ditto for "POSIXlt", fixing PR#18618 reported by Bastian Klein.

• drop.terms(*, dropx = <0-length>) now works, fixing PR#18563 as
  proposed by Mikael Jagan.

• drop.terms(*) keeps + offset(.) terms when it should, PR#18565,
  and drop.terms() no longer makes up a response, PR#18566, fixing
  both bugs thanks to Mikael Jagan.

• getS3method("t", "test") no longer finds the t.test() function,
  fixing PR#18627.

• pdf() and postscript() support for the documented Adobe encodings
  "Greek" and "Cyrilllic" was missing (although the corresponding
  Windows' codepages could be used).

• Computations of glyph metric information for pdf() and
  postscript() did not take into account that transliteration could
  replace one character by two or more (only seen on macOS 14) and
  typically warned that the information was not known.

• rank(x) no longer overflows during integer addition, when
  computing rank average for largish but not-yet long vector x,
  fixing PR#18630, thanks to Ilia Kats.

• list.files() on Windows now returns also files with names longer
  that 260 bytes (the Windows limit is 260 characters).
  Previously, some file names particularly with 'East Asian'
  characters were omitted.

• cov2cor(<0 x 0>) now works, fixing PR#18423 thanks to Mikael
  Jagan and Elin Waring.

• cov2cor(<negative diagonal>) and similar now give one warning
  instead of two, with better wording, fixing PR#18424 thanks to
  Mikael Jagan.

• tools:: startDynamicHelp() now ensures port is in proper range,
  fixing PR#18645.

• pbeta(x, a,b) is correct now for x=0 or 1 in the boundary cases
  where a or b or both are 0, fixing PR#18672 thanks to Michael
  Fay.

• pmatch(x, table) for large table, also called for data frame row
  selection, dfrm[nm, ], is now interruptible, fixing PR#18656.

• predict(<rank-deficient lm>, newdata=*) fix computing of nbasis,
  see Russ Lenth's comment 29 in PR#16158.

• Added a work-around for a bug in macOS 14.3.1 and higher which
  prevents R plots in the Quartz Cocoa device from updating on
  screen.