Overview: 

Network Proxy GUI, sets no_proxy env variable with extra comma at the end of the environment variable no_proxy. this causes the no_proxy variable to match every url.

Steps to Reproduce:

1. Open Network proxy ( Preferences > Network Proxy )
2. On the second tab (Ignored Hosts), add at-least 'localhost'
3. On the first tab (Proxy Configuration) Add a manual proxy 
4. On the first tab (Proxy Configuration) Click Apply system wide.

5. open a termnial   - Display the current no_proxy environment variable

% env | grep -i no_proxy                                                  
NO_PROXY=localhost,127.0.0.0/8,*.local,
no_proxy=localhost,127.0.0.0/8,*.local,

6. Try a wget to a url

% wget http://www.gnome.org/                                              
--2010-05-27 14:58:06--  http://www.gnome.org/
Resolving www.gnome.org... 209.132.180.167
Connecting to www.gnome.org|209.132.180.167|:80...


Expected Results: 

The wget will not use the proxy ( http_proxy or ftp_proxy )


Workaround:

% env |grep -i no_proxy                                                
NO_PROXY=localhost,127.0.0.0/8,*.local,
no_proxy=localhost,127.0.0.0/8,*.local,
% export NO_PROXY=$(echo $NO_PROXY | sed 's/,$//') 
echo $NO_PROXY                                                        
localhost,127.0.0.0/8,*.local
% export no_proxy=$NO_PROXY
% env |grep -i no_proxy                                                
NO_PROXY=localhost,127.0.0.0/8,*.local
no_proxy=localhost,127.0.0.0/8,*.local
wget http://www.gnome.org/                                              15:02
--2010-05-27 15:02:30--  http://www.gnome.org/
Resolving itproxy-farm.XXXX.com.au... 10.64.3.2
Connecting to itproxy-farm.XXXX.com.au|10.64.3.2|:8080... connected.
Proxy request sent, awaiting response... 200 OK
Length: unspecified [text/html]
Saving to: `index.html.2'

    [ <=>                                   ] 7,798       --.-K/s   in 0.004s  

2010-05-27 15:02:31 (1.78 MB/s) - `index.html.2' saved [7798]