"I wasn’t familiar with the code when I opened it, so I assumed the interior white space came from padding on the container. I wanted to add an “admin” checkbox below the user info on the right, and I expected it to align flush left with the name and email. But that’s not what happened."

Styling for change with rules and exceptions - (37signals)

This sort of thing used to do my head in constantly. Back in the days when I still did code, and a certain someone seemed to pad every element individually as some kind of depraved box-model workaround.