Top Ten Web Design Mistakes of 2005

"[Users] just want quality improvements in the basics: text they can read; content that answers their questions; navigation and search that help them find what they want; short and simple forms (streamlined registration, checkout, and other workflow); and no bugs, typos, or corrupted data; no linkrot; no outdated content."

From Jakob Nielsen's "Top Ten Web Design Mistakes of 2005". Go to Nielsen's page for the full deal.