nice list...thanks for pointing out these mistakes.

When we do site design, really need think how to avoid these problems. Thanks for sharing.

thanks for sharing such a nice information with us. there are some mistakes in my website which you have told. now i can remove them easily.

thanks for the list. now i know what to avoid in designing.

i have checked it’s really great

Reading that has inspired me to make some changes to my websites. Thank you.

Awesome list, especially #2!

.PDF files are just plain annoying.

1) Old post.

2) Nielsen is just a loudmouthed amateur and vapor-seller.

3) one-by-one
2. PDF Files for Online Reading
pdf are bad indeed
3. Not Changing the Color of Visited Links
depends on what is that link
4. Non-Scannable Text
mr nielsen forgot about pages ? maybe he doesn't use internet, but having article split to 10-15 1,5kb chunks is a royal pita to read.
5. Fixed Font Size
there are new* browser out here, with zoom function. * and by new i mean everything newer than ie6
7. Anything That Looks Like an Advertisement
true
8. Violating Design Conventions
9. Opening New Browser Windows
how about hijacking right click ? or allowing pages to open new windows (not tabs) at all ??? hint - firefox and safari.

So that's where i made a mistake. Very nice tips. thanks for the tips on knowing where i had taken for granted in designing.