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‘R CMD build’ now omits tarballs and binaries of previous builds from the top-level package directory; PR#17828, patch by Sebastian Meyer.
‘all.equal.POSIXt()’ no longer warns about and subsequently ignores inconsistent ‘"tzone"’ attributes, but describes the difference in its return value (PR#17277). This check can be disabled _via_ the new argument ‘check.tzone = FALSE’; as suggested by Sebastian Meyer.
When ‘install.packages()’ fails to find a package in a source repository it mentions package versions which are excluded by their R version requirement and links to hints on why a package might not be found.