Here are some common qualities of modern websites that can ruin the visitor's enjoyment of them. Some are immediately obvious when visiting with ones normal browsing configuration, while others appear when one tries to work around design faults by disabling certain capabilities (like images or CSS).

• Depen­dence on enhan­cing technol­ogies
• Exces­sive page width
• Absolute-​sized layout
• Font shenan­igans
• <table> for layout
• Inapprop­riate titles
• Inapprop­riate alt text
• Over-​zealous navi­gation
• Insuff­icient colour specif­ication
• Browser detec­tion
• Dupli­cate pages
• Poor coding of image captions