Dear Francis:

Here are the answers to your questions. Thank YOU for helping!

The location block are in the following order:

Location #1
location ~ ^/(api|contentAsset|categoriesServlet|DotAjaxDirector|html|dwr|dA)/ {}

Location #2 ----> This location does the lowercasing
location ~ [A-Z] { return 301 $scheme://$host$my_uri_to_lowercase;}

Location #3
location /{}

Everything is lowercased. So I want some paths to be untouched. So I created location #1 to exclude some paths from lowercasing. The problem is that
in some URLs containing the paths above are lowercased. For example:
/dwr/interface/CategoryAjax.js, /dwr/interface/HostAjax.js are lowercased.
Also, /html/images/languages/gh_TW.gif

Any help will be appreciated!



Note: The function definition for $my_uri_to_lowercase is inside my http definition, here is a copy of it:
##
## URL REWRITE FUNCTION: LOWERCASE ALL URIs
## START

perl_set $my_uri_to_lowercase 'sub {
my $r = shift;
my $uri = $r->uri;
$uri = lc($uri);
return $uri;
}';