Jakob Nielsen’s Alertbox lists the web design stupidities that irked users the most in 2005.

1. Legibility Problems
2. Non-Standard Links
3. Flash
4. Content That’s Not Written for the Web
5. Bad Search
6. Browser Incompatibility
7. Cumbersome Forms
8. No Contact Information or Other Company Info
9. Frozen Layouts with Fixed Page Widths
10. Inadequate Photo Enlargement

Read about all the faux-pas in detail…