Sweave and R 3.1.0: no pdfs generated

Question

After upgrading R to version 3.1.0 (from some version 2.x.x), the following sweave code does not produce any pdfs for the plots anymore:

\documentclass[a4paper,10pt]{article}
\SweaveOpts{echo=FALSE}

\begin{document}

\begin{figure}
\begin{center}
<<fig = T, echo = F, include=T>>=
x=rnorm(100)
plot(x)
@
\caption{My Graph}
\end{center}
\end{figure}

\end{document}

To compile, I use R CMD Sweave foo.Rnw followed by R CMD pdflatex foo.tex. Why is that and how can I fix it? I played around with the options: fig = TRUE, pdf = TRUE and so on - to no avail.

Edit: Here is the output of R CMD Sweave foo.Rnw, which should create the pdf files:

R CMD Sweave foo.Rnw
stat_bin: binwidth defaulted to range/30. Use 'binwidth = x' to adjust this.
Output file:  foo.tex
R CMD pdflatex foo.tex
....

Answer 1

I updated R to version 3.1.1 (by removing R 3.1.0 and installing R 3.1.1 from source) - and voila, it works!