I know we've covered what questions you should ask about a company before you would decide to work there.  But what do you do with the answers?

In other words, what would you consider a dealbreaker?  I.e. what would scare you so much about a company that you wouldn't work there, even if everything else was great?

For example, if they tell me they don't use version control, I wouldn't work there.  End of story.

Companies that feel the need to mention up-front that unpaid (for salaried employees) overtime is required 100% of the time.