I am a freelance webdesigner and I was making a website for a company. I made some files, packed them and sent through email to the project manager. He watched it and told me to change several things in two files, so I did, and sent him those two files.
It was after 10 p.m., a phonecall:
Project manager: The site doesn't work!
Me: What do you mean it doesn't work?
PM: It doesn't work at all!
Me: Describe it to me, what it does?
PM: Well, it looks like there's no graphics at all, only text.
Me: Hm, did you copy the additional files to the folder with the site?
PM: Was I supposed to?