Many of these gotchas have been known for quite a while. I suggest, for people who still don't know it, to read the UNIX-HATERS handbook

- homepage http://homes.cs.washington.edu/~weise/unix-haters.html

- working download link http://richard.esplins.org/static/downloads/unix-haters-hand...

A lot of it is outdated, and yet many things are still incredibly relevant