The wiki does specify Arduino 1.0.3 as the required software, so that’s only *almost* following wiki procedures. ;)
In any case, I’ve downloaded 1.0.5, and I am unable to reproduce your error (at least on a Mac). The error may have to do with the underlying version of avr-libc installed on your computer.
You might try opening up the file in question (fiveletterwords.h) and adding the word “const” in front of that variable definition, like so:
const unsigned int fiveLetterPosArray
to see if that fixes it for you.
