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Every so often I'll be working and all of a sudden xelatex won't work, saying "I can't write on file `test.pdf'". But why not? Is it something I did? Did I insult xelatex? Now it won't even compile my helloWorld.tex.
The input
\documentclass{article}
\usepackage{fontspec,xltxtra,xunicode}
\setm...