The most common bikeshed problem with web development is with design and user interface. We nicknamed this the 'cornflower blue' problem (fight club reference). Everybody thinks they know what good UI and design is, and they will certainly let you know what they think is right.

I am sure many of you have had the exact same problem, and have also resorted to hiding a new project from various staff members just to prevent the project from becoming a quagmire.