They couldn't see eye to eye. IT was methodical and concerned about process. Marketing saw them as obstructionist and thought the IT department just didn't understand their needs. To a degree, marketing was right. On the flip side, the marketing department didn't completely understand how people interacted with computers and what made sense to put on the Internet.
Marketing takes care of content.
IT manages the servers. Public relations posts press releases. And sometimes sales even gets to have orders filled online. But the effort is often disjointed and out of control. Web sites, especially big sites that involve e-commerce, are forcing companies to reconsider working relationships and even their own internal organizational structure.