My first project at the job was implenting a website, designed by the same company we mostly worked with.
It was very stressful because half of the 2 months calculated for finishing the project, these genius designers needed for their design. Until then, I had almost no tasks to do...
When the designs finally came, I worked on it and two weeks later was a meeting for review and to decide about some details.
These fuckers then concluded, that the whole design did not fit the page and that they would rework it.
Two weeks later, on the planned release day, we finally received it. A completely fucking different design! Wow!
My boss was pretty angry and so was I. We had to move the release 4 weeks ahead, the client was pissed like a stinking hobo and it needed a lot of convincing to keep that client...

It's fucking nerve-wracking as well that we always have to wait in most projects for weeks for clients or designers to add the content before we can publish a website.
They don't seem to care if they have 2 months or 2 weeks, we never were able to release one single project on time, because of these lazy fuckers...