Also, someone should make note to inform PHP that there are some typos in the manual, if someone hasn't done that already. I read through it last night and found a few errors, from wrong wording to misinformation. If you look at the tire size calculation scenario, the number in one of the last steps is wrong, making it look like the squish calculation is incorrect (I would be specific but am not looking at it right now). There was another instance I can remember where the word automotive was used in place of automatic (spell check error?) Think there were at least 1 or 2 more as well.
I'm posting this here since I know 88 posts a lot of messages to the "board" and probably has more correspondence with PHP staff. I'm not personally irritated with it, but most would not expect to see typographical or grammatical errors in a manual for a product sold by an established, reputable firm. I write technically for my job and get nailed with this kind of stuff everyday, so it's almost my nature to address it.
I'm willing to assist if anyone ever needs writing assistance from me. PHP has been very good to me thus far.