lol, and file permissions dont have anything to do with wordpress? while they dont have anything to do with the version being used, or "code" (yes I noticed your qualification) they have EVERYTHING to do with wordpress, especially when you have plugins written by wordpress devs that require, NOT suggest, but require that certain directories be world-writable.
I think we are on the same page, atleast I hope that I am. frankly, all Im suggesting is that way too many people put up sites, and dont know what theyre doing, dont know jack about permissions, dont know what to do to insure the that most basic of things are taken care of, and dont stay up to date on the software theyre using.
My god, the evidence of that FACT is all over this site!!
Responsible web mastering is on its way out. And I dont buy "its the hosts fault" crap that tends to spew off software sites. Its not, its the users fault.