Cache doesn't work for me as I expected -> enable_query_strings = TRUE

[eluser]ckissi[/eluser]
Hello,

I tried cache but it doesn't work for me as it should.

Here is my config:

Code:

$config['uri_protocol']    = "AUTO";    
$config['enable_query_strings'] = TRUE;
$config['directory_trigger'] = 'd';
$config['controller_trigger'] = 'c';
$config['function_trigger'] = 'm';

I use mod_rewrite so my URL : index.html is rewrited to index.php?c=homepage&m=homepage_show

When I cache this page, every page I access on my site will return the same home page that was just cached.
I tried to go through code and found this in system/libraries/output.php:

Code:

$uri =    $CI->config->item('base_url').$CI->config->item('index_page').CI->uri->uri_string();

I made a little test and my CI->uri->uri_string() is empty ... so every page is cached as /index.php and query_string is simply ignored so :
index.php?c=homepage&m=homepage_show is cached as index.php
and every other page is also cached as index.php