Not enough planning and general apathy. We'll start a project and then half the devs will go on vacation. They return, and then the other half go on vacation.

Not enough planning and general apathy. We'll start a project and then half the devs will go on vacation. They return, and then the other half go on vacation. I guess that's summer for ya, but why not just close the office for a month and let everyone know that they should take their vacations around that time. Devs will raise complaints about the work environment or a poorly written (but critical) module, but nothing gets done about it. If a feature doesn't have strong executive support, nothing really gets done on it, and 3 months later someone will ask "hey, what happened to that feature?"