programming fuck ups

What's the biggest screw up you ever made writing software?  Once a team I was on overshot a DCUT for some datacenter automation tools by two weeks, and it still ended up being shitty because the customer kept wanting to add shit.

>>49
#include <windows>
error: windows: No such file or directory
You might want to make that piece of crap (code, whatever) a little bit more portable... As for deltree:
-bash: deltree: command not found