1. The Download Code link was not working properly
2. The Short URL functionality was not working, as Snipr had deprecated the version of the API that the program was using

Below is a consolidated diff of the changes. You should be able to use it to apply a patch to 0.5.4 if you are having these issues.

stikked.diff

Index: trunk/system/application/models/pastes.php
===================================================================
--- trunk/system/application/models/pastes.php	(revision 1)
+++ trunk/system/application/models/pastes.php	(revision 2)
@@ -156,14 +156,55 @@
 			$data['snipurl'] = false;
 		}
 		else
-		{
-			$target = 'http://snipr.com/site/snip?r=simple&link='.site_url('view/'.$data['pid']);
+		{
+			// this next blob just copied from snipr's examples,
+			// with some modifications of course
+
+			// REQUIRED FIELDS
+			$sniplink  = site_url('view/'.$data['pid']);
+			$snipuser  = $this->config->item('snipr_user');            // YOUR USER ID REQUIRED
+			$snipapi   = $this->config->item('snipr_apikey');               // FIND IN YOUR "SETTINGS" PAGE
+
+			// OPTIONAL FIELDS
+			$snipnick   = '';            // MEANINGFUL NICKNAME FOR SNIPURL
+			$sniptitle  = $data['title'];  // TITLE IF ANY
+			$snippk     = '';                      // PRIVATE KEY IF ANY
+			$snipowner  = '';                      // IF THE SNIP OWNER IS SOMEONE ELSE
+			$snipformat = 'simple';                      // DEFAULT RESPONSE IS IN XML, SEND "simple"
+			                                       // FOR JUST THE SNIPURL
+			$snipformat_includepk = "";            // SET TO "Y" IF YOU WANT THE PRIVATE KEY
+			                                       // RETURNED IN THE SNIPURL ALONG WITH THE ALIAS
+
+			//----------------------------------
+			// NO NEED TO EDIT BEYOND THIS POINT
+			//----------------------------------
+			$URL        = 'http://snipr.com/site/getsnip';
+			$sniplink   = rawurlencode($sniplink);
+			$snipnick   = rawurlencode($snipnick);
+			$sniptitle  = rawurlencode($sniptitle);
+
+
+			$post_data =  'sniplink='  . $sniplink  . '&' .
+			              'snipnick='  . $snipnick  . '&' .
+			              'snipuser='  . $snipuser  . '&' .
+			              'snipapi='   . $snipapi   . '&' .
+			              'sniptitle=' . $sniptitle . '&' .
+			              'snipowner=' . $snipowner . '&' .
+			              'snipformat='. $snipformat. '&' .
+			              'snippk='    . $snippk
+			  ;
+
+
+			$target = $this->config->item('snipr_link');
 			$ch = curl_init();
 			curl_setopt($ch, CURLOPT_URL, $target);
+			curl_setopt($ch, CURLOPT_POST, true);
+			curl_setopt($ch, CURLOPT_HEADER, 0);
+			curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);
 			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

 			$data['snipurl'] = curl_exec($ch);
-
+
 			curl_close($ch);

 			if(empty($data['snipurl']))
@@ -189,6 +230,7 @@

 	function checkPaste($seg=2)
 	{
+
 		if($this->uri->segment($seg) == "")
 		{
 			return false;
Index: trunk/system/application/config/routes.php
===================================================================
--- trunk/system/application/config/routes.php	(revision 1)
+++ trunk/system/application/config/routes.php	(revision 2)
@@ -46,6 +46,7 @@
 $route['cron/:any'] = "main/cron";

 $route['view/raw/:any'] = 'main/raw/';
+$route['view/download/:any'] = 'main/download/';
 $route['view/options'] = 'main/view_options';
 $route['view/:any'] = 'main/view';
 $route['lists'] = 'main/lists';
Index: trunk/system/application/config/config.php
===================================================================
--- trunk/system/application/config/config.php	(revision 1)
+++ trunk/system/application/config/config.php	(revision 2)
@@ -308,4 +308,16 @@
 $config['rewrite_short_tags'] = FALSE;

+/*
+|--------------------------------------------------------------------------
+| Snipr Settings - Used for short URL
+|--------------------------------------------------------------------------
+|
+| Settings for Snipr API
+|
+*/
+$config['snipr_link'] = 'http://snipurl.com/site/getsnip';
+$config['snipr_user'] = ''; // snipr user name
+$config['snipr_apikey'] = '';
+
 ?>
\ No newline at end of file
Index: trunk/system/application/views/view/download.php
===================================================================
--- trunk/system/application/views/view/download.php	(revision 1)
+++ trunk/system/application/views/view/download.php	(revision 2)
@@ -1,6 +1,6 @@
 <?php

-header('Content-disposition: attachment');
+header('Content-disposition: attachment;filename='.$title.'.'.$lang_code);
 echo html_entity_decode($raw);

 ?>
\ No newline at end of file
Index: trunk/system/libraries/URI.php
===================================================================
--- trunk/system/libraries/URI.php	(revision 1)
+++ trunk/system/libraries/URI.php	(revision 2)
@@ -186,8 +186,15 @@
 	{
 		if ($str != '' AND $this->config->item('permitted_uri_chars') != '')
 		{
-			if ( ! preg_match("|^[".preg_quote($this->config->item('permitted_uri_chars'))."]+$|i", $str))
+			$matches = array();
+			$pattern = "|^[".preg_quote($this->config->item('permitted_uri_chars'))."]+$|i";
+			if ( ! preg_match($pattern, $str, $matches))
 			{
+				echo '<pre>*'.$str.'*<br>';
+				echo 'allowed: '.$pattern.'<br>';
+				var_dump($matches);
+				var_dump(debug_backtrace());
+				echo '</pre>';
 				exit('The URI you submitted has disallowed characters.');
 			}
 		}