Rated 5 out of 5 stars

There is a bug when you search some keywords in images.google.* : the link to the image page contains &usg= at the end and returns a 404 error.

To fix this bug,
1. close all firefox windows

2. go to C:\Documents and Settings\[YOUR_NAME]\Application Data\Mozilla\Firefox\Profiles\[YOUR_PROFILE]\extensions\{fce36c1e-58d8-498a-b2a5-66ad1cedebbb}\chrome\

3. un-zip customizegoogle.jar\content\customizegoogle\javascript.js and open it

4. replace the line 42 :
var urlmatch = googLinks[x].href.match(/\&imgrefurl\=(.*?)\&h=/);
with the line :
var urlmatch = googLinks[x].href.match(/\&imgrefurl\=(.*?)\&usg=/);

5. re-zip the new javascript.js in customizegoogle.jar\content\customizegoogle\

fixed ! :-)