(This article was first published on i'm a chordata! urochordata! » R, and kindly contributed to R-bloggers)
For those who are excited about the new 2.13.0 release of R (particularly the compiler package) but are grumbling about having to remember what packages they have and re-install them, see this great advice or this piece on upgrading in osx for how to automate the process.
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Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).