inconsolata.sty is liable to disappear, texinfo 5.1
We use the inconsolata LaTeX package by default for monospaced text in R
PDF manuals, including package reference manuals (so needed to R CMD check).
You might find inconsolata.sty suddenly disappearing from your system:
it happened to me with a MiKTeX update earlier this week. OTOH, TeXLive
2013 and MacTeX 2013, released on Tuesday, still have it. But I suspect
a TeXLive update may change this shortly.
On a similar note, if your system decides to update the GNU texinfo
package to 5.x and you want to make the R manuals, you need to use
R-patched or R-devel. (That includes installing R from the sources.)
As far as we know, no distro has yet released a version with the
incompatible texinfo 5.1, but it is in Debian testing and Fedora 19 beta.