Add this code to "application/controllers/main.php" at around line 125... it fixes the "Undefined variable: uri_segments" error that occurs when folks use the Unicorn theme with older versions of the Ushahidi platform.

main-snippet.php

//pass the URI to the header so we can dynamically add css classes to the "body" tag	
$this->template->header->uri_segments = Router::$segments;

main.php

<?php defined('SYSPATH') or die('No direct script access.');
/**
 * This is the controller for the main site.
 *
 * PHP version 5
 * LICENSE: This source file is subject to LGPL license
 * that is available through the world-wide-web at the following URI:
 * http://www.gnu.org/copyleft/lesser.html
 * @author     Ushahidi Team <team@ushahidi.com>
 * @package    Ushahidi - http://source.ushahididev.com
 * @copyright  Ushahidi - http://www.ushahidi.com
 * @license    http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License (LGPL)
 */
class Main_Controller extends Template_Controller {
	/**
	 * Automatically render the views loaded in this controller
	 * @var bool
	 */
	public $auto_render = TRUE;
	
	/**
	 * Name of the template view
	 * @var string
	 */
	public $template = 'layout';
	
	/**
	 * Cache object - to be used for caching content
	 * @var Cache
	 */
	protected $cache;
	
	/**
	 * Whether the current controller is cacheable - defaults to FALSE
	 * @var bool
	 */
	public $is_cachable = FALSE;
	
	/**
	 * Session object
	 * @var Session
	 */
	protected $session;
	
	/**
	 * Prefix for the database tables
	 * @var string
	 */
	protected $table_prefix;
	
	/**
	 * Themes helper library object
	 * @var Themes
	 */
	protected $themes;
	
	// User Object
	protected $user;

	public function __construct()
	{
		parent::__construct();
		
		$this->auth = new Auth();
		$this->auth->auto_login();
		
		// Load Session
		$this->session = Session::instance();
		
		if(Kohana::config('settings.private_deployment'))
		{
			if ( ! $this->auth->logged_in('login'))
			{
				url::redirect('login/front');
			}
		}
		
        // Load cache
		$this->cache = new Cache;

        // Load Header & Footer
		$this->template->header  = new View('header');
		$this->template->footer  = new View('footer');

		// Themes Helper
		$this->themes = new Themes();
		$this->themes->api_url = Kohana::config('settings.api_url');
		$this->template->header->submit_btn = $this->themes->submit_btn();
		$this->template->header->languages = $this->themes->languages();
		$this->template->header->search = $this->themes->search();

		// Set Table Prefix
		$this->table_prefix = Kohana::config('database.default.table_prefix');

		// Retrieve Default Settings
		$site_name = Kohana::config('settings.site_name');
		
		// Get banner image and pass to the header
		if(Kohana::config('settings.site_banner_id') != NULL){
			$banner = ORM::factory('media')->find(Kohana::config('settings.site_banner_id'));
			$this->template->header->banner = $banner->media_link;
		}else{
			$this->template->header->banner = NULL;
		}
		
		// Prevent Site Name From Breaking up if its too long
		// by reducing the size of the font
		$site_name_style = (strlen($site_name) > 20) ? " style=\"font-size:21px;\"" : "";
			
		$this->template->header->private_deployment = Kohana::config('settings.private_deployment');
		$this->template->header->loggedin_username = FALSE;
		$this->template->header->loggedin_userid = FALSE;
		
		if ( isset(Auth::instance()->get_user()->username) AND isset(Auth::instance()->get_user()->id) )
		{
			// Load User
			$this->user = Auth::instance()->get_user();
			$this->template->header->loggedin_username = html::specialchars(Auth::instance()->get_user()->username);
			$this->template->header->loggedin_userid = Auth::instance()->get_user()->id;
			$this->template->header->loggedin_role = ( Auth::instance()->logged_in('member') ) ? "members" : "admin";
		}
		
		$this->template->header->site_name = $site_name;
		$this->template->header->site_name_style = $site_name_style;
		$this->template->header->site_tagline = Kohana::config('settings.site_tagline');

		//pass the URI to the header so we can dynamically add css classes to the "body" tag
		$this->template->header->uri_segments = Router::$segments;

		$this->template->header->this_page = "";

		// Google Analytics
		$google_analytics = Kohana::config('settings.google_analytics');
		$this->template->footer->google_analytics = $this->themes->google_analytics($google_analytics);

        // Load profiler
        // $profiler = new Profiler;

		// Get tracking javascript for stats
		$this->template->footer->ushahidi_stats = (Kohana::config('settings.allow_stat_sharing') == 1)
			? Stats_Model::get_javascript()
			: '';
		
		// add copyright info
		$this->template->footer->site_copyright_statement = '';
		$site_copyright_statement = trim(Kohana::config('settings.site_copyright_statement'));
		if($site_copyright_statement != '')
		{
			$this->template->footer->site_copyright_statement = $site_copyright_statement;
		}
		
	}

	/**
	 * Retrieves Categories
	 */
	protected function get_categories($selected_categories)
	{
	  $categories = ORM::factory('category')
	    ->where('category_visible', '1')
	    ->where('parent_id', '0')
	    ->where('category_trusted != 1')
	    ->orderby('category_title', 'ASC')
	    ->find_all();

	  return $categories;
	}

    public function index()
    {
        $this->template->header->this_page = 'home';
        $this->template->content = new View('main');

		// Cacheable Main Controller
		$this->is_cachable = TRUE;

		// Map and Slider Blocks
		$div_map = new View('main_map');
		$div_timeline = new View('main_timeline');
		
		// Filter::map_main - Modify Main Map Block
		Event::run('ushahidi_filter.map_main', $div_map);
		
		// Filter::map_timeline - Modify Main Map Block
		Event::run('ushahidi_filter.map_timeline', $div_timeline);
		
		$this->template->content->div_map = $div_map;
		$this->template->content->div_timeline = $div_timeline;

		// Check if there is a site message
		$this->template->content->site_message = '';
		$site_message = trim(Kohana::config('settings.site_message'));
		if($site_message != '')
		{
			$this->template->content->site_message = $site_message;
		}

		// Get locale
		$l = Kohana::config('locale.language.0');

        // Get all active top level categories
		$parent_categories = array();
		foreach (ORM::factory('category')
				->where('category_visible', '1')
				->where('parent_id', '0')
				->orderby('category_position', 'asc')
				->find_all() as $category)
		{
			// Get The Children
			$children = array();
			foreach ($category->orderby('category_position', 'asc')->children as $child)
			{
				// Check for localization of child category

				$translated_title = Category_Lang_Model::category_title($child->id,$l);

				$display_title = ($translated_title)? $translated_title : $child->category_title;

				$children[$child->id] = array(
					$display_title,
					$child->category_color,
					$child->category_image
				);

				if ($child->category_trusted)
				{ // Get Trusted Category Count
					$trusted = ORM::factory("incident")
						->join("incident_category","incident.id","incident_category.incident_id")
						->where("category_id",$child->id);
					if ( ! $trusted->count_all())
					{
						unset($children[$child->id]);
					}
				}
			}

			// Check for localization of parent category
			$translated_title = Category_Lang_Model::category_title($category->id,$l);

			$display_title  = ($translated_title)? $translated_title : $category->category_title;

			// Put it all together
			$parent_categories[$category->id] = array(
				$display_title,
				$category->category_color,
				$category->category_image,
				$children
			);

			if ($category->category_trusted)
			{ // Get Trusted Category Count
				$trusted = ORM::factory("incident")
					->join("incident_category","incident.id","incident_category.incident_id")
					->where("category_id",$category->id);
				if ( ! $trusted->count_all())
				{
					unset($parent_categories[$category->id]);
				}
			}
		}
		$this->template->content->categories = $parent_categories;

		// Get all active Layers (KMZ/KML)
		$layers = array();
		$config_layers = Kohana::config('map.layers'); // use config/map layers if set
		if ($config_layers == $layers) {
			foreach (ORM::factory('layer')
					  ->where('layer_visible', 1)
					  ->find_all() as $layer)
			{
				$layers[$layer->id] = array($layer->layer_name, $layer->layer_color,
					$layer->layer_url, $layer->layer_file);
			}
		}
		else
		{
			$layers = $config_layers;
		}
		$this->template->content->layers = $layers;

		// Get all active Shares
		$shares = array();
		foreach (ORM::factory('sharing')
				  ->where('sharing_active', 1)
				  ->find_all() as $share)
		{
			$shares[$share->id] = array($share->sharing_name, $share->sharing_color);
		}
		$this->template->content->shares = $shares;

		// Get Default Color
		$this->template->content->default_map_all = Kohana::config('settings.default_map_all');

		// Get Twitter Hashtags
		$this->template->content->twitter_hashtag_array = array_filter(array_map('trim',
			explode(',', Kohana::config('settings.twitter_hashtags'))));

		// Get Report-To-Email
		$this->template->content->report_email = Kohana::config('settings.site_email');

		// Get SMS Numbers
		$phone_array = array();
		$sms_no1 = Kohana::config('settings.sms_no1');
		$sms_no2 = Kohana::config('settings.sms_no2');
		$sms_no3 = Kohana::config('settings.sms_no3');
		if ( ! empty($sms_no1))
		{
			$phone_array[] = $sms_no1;
		}
		if ( ! empty($sms_no2))
		{
			$phone_array[] = $sms_no2;
		}
		if ( ! empty($sms_no3))
		{
			$phone_array[] = $sms_no3;
		}
		$this->template->content->phone_array = $phone_array;

        // Get The START, END and Incident Dates
        $startDate = "";
		$endDate = "";
		$display_startDate = 0;
		$display_endDate = 0;

		$db = new Database();
        // Next, Get the Range of Years
		$query = $db->query('SELECT DATE_FORMAT(incident_date, \'%Y-%c\') AS dates FROM '.$this->table_prefix.'incident WHERE incident_active = 1 GROUP BY DATE_FORMAT(incident_date, \'%Y-%c\') ORDER BY incident_date');

		$first_year = date('Y');
		$last_year = date('Y');
		$first_month = 1;
		$last_month = 12;
		$i = 0;

		foreach ($query as $data)
		{
			$date = explode('-',$data->dates);

			$year = $date[0];
			$month = $date[1];

			// Set first year
			if($i == 0)
			{
				$first_year = $year;
				$first_month = $month;
			}

			// Set last dates
			$last_year = $year;
			$last_month = $month;

			$i++;
		}

		$show_year = $first_year;
		$selected_start_flag = TRUE;
		while($show_year <= $last_year)
		{
			$startDate .= "<optgroup label=\"".$show_year."\">";

			$s_m = 1;
			if($show_year == $first_year)
			{
				// If we are showing the first year, the starting month may not be January
				$s_m = $first_month;
			}

			$l_m = 12;
			if($show_year == $last_year)
			{
				// If we are showing the last year, the ending month may not be December
				$l_m = $last_month;
			}

			for ( $i=$s_m; $i <= $l_m; $i++ )
			{
				if ( $i < 10 )
				{
					// All months need to be two digits
					$i = "0".$i;
				}
				$startDate .= "<option value=\"".strtotime($show_year."-".$i."-01")."\"";
				if($selected_start_flag == TRUE)
				{
					$display_startDate = strtotime($show_year."-".$i."-01");
					$startDate .= " selected=\"selected\" ";
					$selected_start_flag = FALSE;
				}
				$startDate .= ">".date('M', mktime(0,0,0,$i,1))." ".$show_year."</option>";
			}
			$startDate .= "</optgroup>";

			$endDate .= "<optgroup label=\"".$show_year."\">";
			for ( $i=$s_m; $i <= $l_m; $i++ )
			{
				if ( $i < 10 )
				{
					// All months need to be two digits
					$i = "0".$i;
				}
				$endDate .= "<option value=\"".strtotime($show_year."-".$i."-".date('t', mktime(0,0,0,$i,1))." 23:59:59")."\"";

                if($i == $l_m AND $show_year == $last_year)
				{
					$display_endDate = strtotime($show_year."-".$i."-".date('t', mktime(0,0,0,$i,1))." 23:59:59");
					$endDate .= " selected=\"selected\" ";
				}
				$endDate .= ">".date('M', mktime(0,0,0,$i,1))." ".$show_year."</option>";
			}
			$endDate .= "</optgroup>";

			// Show next year
			$show_year++;
		}

		Event::run('ushahidi_filter.active_startDate', $display_startDate);
		Event::run('ushahidi_filter.active_endDate', $display_endDate);
		Event::run('ushahidi_filter.startDate', $startDate);
		Event::run('ushahidi_filter.endDate', $endDate);
		
		$this->template->content->div_timeline->startDate = $startDate;
		$this->template->content->div_timeline->endDate = $endDate;

		// Javascript Header
		$this->themes->map_enabled = TRUE;
		$this->themes->main_page = TRUE;

		// Map Settings
		$clustering = Kohana::config('settings.allow_clustering');
		$marker_radius = Kohana::config('map.marker_radius');
		$marker_opacity = Kohana::config('map.marker_opacity');
		$marker_stroke_width = Kohana::config('map.marker_stroke_width');
		$marker_stroke_opacity = Kohana::config('map.marker_stroke_opacity');

        // pdestefanis - allows to restrict the number of zoomlevels available
		$numZoomLevels = Kohana::config('map.numZoomLevels');
		$minZoomLevel = Kohana::config('map.minZoomLevel');
	   	$maxZoomLevel = Kohana::config('map.maxZoomLevel');

		// pdestefanis - allows to limit the extents of the map
		$lonFrom = Kohana::config('map.lonFrom');
		$latFrom = Kohana::config('map.latFrom');
		$lonTo = Kohana::config('map.lonTo');
		$latTo = Kohana::config('map.latTo');

		$this->themes->js = new View('main_js');
		$this->themes->js->json_url = ($clustering == 1) ?
			"json/cluster" : "json";
		$this->themes->js->marker_radius =
			($marker_radius >=1 && $marker_radius <= 10 ) ? $marker_radius : 5;
		$this->themes->js->marker_opacity =
			($marker_opacity >=1 && $marker_opacity <= 10 )
			? $marker_opacity * 0.1  : 0.9;
		$this->themes->js->marker_stroke_width =
			($marker_stroke_width >=1 && $marker_stroke_width <= 5 ) ? $marker_stroke_width : 2;
		$this->themes->js->marker_stroke_opacity =
			($marker_stroke_opacity >=1 && $marker_stroke_opacity <= 10 )
			? $marker_stroke_opacity * 0.1  : 0.9;

		// pdestefanis - allows to restrict the number of zoomlevels available
		$this->themes->js->numZoomLevels = $numZoomLevels;
		$this->themes->js->minZoomLevel = $minZoomLevel;
		$this->themes->js->maxZoomLevel = $maxZoomLevel;

		// pdestefanis - allows to limit the extents of the map
		$this->themes->js->lonFrom = $lonFrom;
		$this->themes->js->latFrom = $latFrom;
		$this->themes->js->lonTo = $lonTo;
		$this->themes->js->latTo = $latTo;

		$this->themes->js->default_map = Kohana::config('settings.default_map');
		$this->themes->js->default_zoom = Kohana::config('settings.default_zoom');
		$this->themes->js->latitude = Kohana::config('settings.default_lat');
		$this->themes->js->longitude = Kohana::config('settings.default_lon');
		$this->themes->js->default_map_all = Kohana::config('settings.default_map_all');

		$this->themes->js->active_startDate = $display_startDate;
		$this->themes->js->active_endDate = $display_endDate;
		
		$this->themes->js->blocks_per_row = Kohana::config('settings.blocks_per_row');

		//$myPacker = new javascriptpacker($js , 'Normal', false, false);
		//$js = $myPacker->pack();

		// Rebuild Header Block
		$this->template->header->header_block = $this->themes->header_block();
	}

} // End Main

Iam still having the problem. Can you send the main.php file with the line inserted, because when I do so it shows another error that regards to the header.php file.. in this time with the error 52. help me with this please.

Hi Flatus,

I've just updated the gist so it has the full "main.php" file. If that doesn't work, I would suggest just reinstalling the platform with the latest code.

Hi. I better reinstall again the platform.. now I have the following error: C:/wamp/www/ushahidi/system/libraries/drivers/Database/Mysql.php [367]: Database error: Unknown column 'category_position' in 'order clause' - SELECT `category`.\* FROM `category` WHERE `category_visible` = '1' AND `parent_id` = '0' ORDER BY `category_position` ASC PS: Iam going to reinstall and let you know if it worked. Obrigado, tank u for be patient,

On Tue, Sep 20, 2011 at 7:49 PM, Caleb Bell ***@***.*** wrote: Hi Flatus, I've just updated the gist so it has the full "main.php" file.  If that doesn't work, I would suggest just reinstalling the platform with the latest code. ## Reply to this email directly or view it on GitHub: https://gist.github.com/1229518

## ## Flatus Samuetus Analise de Sistemas e Gestao de Projectos, Web, Redes, Base de Dados... Helpdesk.. Cel: +258-82-3655683 ##        Maputo-Mocambique Amdores Construiram a Arca de Noe a Profissionais o Titanic...