iCab Easter Egg - Hidden Sounds

One of the features of iCab is the smiley face in the menu barthat displays the errors in the page source.

Shift-click on it.
Depending on if there are errors in the page, you will hear one of three things;

If the face is happy it will say "Ooh! This page makes me feel all tingly inside." If the face is sad, it will say "What is this? We have standards, you know." If it is a neutral face, it will say "Well… I guess there are no actual errors."