[R-SIG-Mac] Cairo: Fontconfig error: Cannot load default config file

[Jeroen Ooms]

Running on R 3.1 on my Mavericks laptop:

options(bitmapType = "cairo");
svg("cars.svg", width=11.69, height=8.27)
plot(cars)
dev.off()

Gives a message: Fontconfig error: Cannot load default config file.
The text in the svg seems heavily pixelated. The same happens when
using png().

IIRC, this did not happen on R 3.0, although I am now starting to
doubt this. Is there anything on my machine that I try to
update/reinstall to fix this?