+6  A: 

This is caused by assigning jQuery to use a key down/up event. it's a meaningless warning and you can safely ignore it. You can turn off javascript warnings in firebug if you wish.

Raveren
im using the google api, do they have the 1.4.2 version, sorry for the stupid question
getaway
I've edited the answer, as it still shows the warning if warnings are turned on in FB, anyway, do update, the 1.4.2 is shinier :) `http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js`
Raveren
why is 1.4.2 is shinier :))) thanks
getaway
you can see the list of changes here: http://blog.jquery.com/2010/02/19/jquery-142-released/
Raveren
+1  A: 

Take a look at here. it explains the problem clearly.

Kamyar
You could directly link to the original SO question: http://stackoverflow.com/questions/3568106
sth
I did in first post's comments. Hadn't noticed that the site is fetching its data from SO. link edited. sorry.
Kamyar
A: 

In non-IE browsers (before version 9), the event associated with a keydown (or keyup) event has a keyCode property, the same property IE uses for all key events.

only the keypress can return an event with a charCode. And, amusingly, a keypress can also return a keyCode in non-IE browsers, corresponding to the unmodified printable key or a control key.

kennebec