My colleagues and I spent two furious days redrafting a bunch of technical diagrams in response to client feedback. Few matters of substance, but they key thing they wanted was a certain style of arrows and such.
There are a number of actual mistakes they haven't spotted, nor has anyone on my team. It won't matter, it will be done right when the project is implemented, and I'm damned if I'm going to point them out and have a fire drill fixing typos.