This blog is updated daily.
A general description is here.
The MSVC run-time (used by MinGW) has a global variable to determine whether files default to text or binary mode. R now overrides this setting so that files are always read in text mode by default: this is relevant to embedded uses of R.
proc.time() was missing a protect and could misbehave if provoked by gctorture(). (PR#10600)