As a web developer i was expected to do everything.
It was always the same old story - my 14 year old nephew can do photoshop and make web pages, why cant you do it on my high-end web app? Oh and i expect you to do it for free......

Web developers tend to be generalists because we have to. Design is a very different skill, and just because you can do one, it doesnt mean you can do the other. There are some who excell at both disciplines, but they are quite rare.