diff --git a/phpBB/adm/style/install_update.html b/phpBB/adm/style/install_update.html
index f0df138641..c61f5ce1a2 100644
--- a/phpBB/adm/style/install_update.html
+++ b/phpBB/adm/style/install_update.html
@@ -348,6 +348,25 @@
 
 		<!-- ENDIF -->
 
+		<!-- IF .deleted -->
+			<h2>{L_FILES_DELETED}</h2>
+			<p>{L_FILES_DELETED_EXPLAIN}</p>
+
+			<fieldset>
+				<legend><img src="{T_IMAGE_PATH}icon_delete.gif" alt="{L_STATUS_DELETED}" /></legend>
+				<!-- BEGIN deleted -->
+				<dl>
+					<dt style="width: 60%;"><strong><!-- IF deleted.DIR_PART -->{deleted.DIR_PART}<br /><!-- ENDIF -->{deleted.FILE_PART}</strong>
+					</dt>
+					<dd style="margin-{S_CONTENT_FLOW_BEGIN}{L_COLON} 60%;">
+						<!-- IF not deleted.S_BINARY -->[<a href="{deleted.U_SHOW_DIFF}" onclick="diff_popup(this.href); return false;">{deleted.L_SHOW_DIFF}</a>]<!-- ELSE -->{L_BINARY_FILE}<!-- ENDIF -->
+					</dd>
+				</dl>
+				<!-- END deleted -->
+			</fieldset>
+
+		<!-- ENDIF -->
+
 		<br />
 
 		<fieldset class="quick">
diff --git a/phpBB/install/install_update.php b/phpBB/install/install_update.php
index 87b7d8d703..e7a7a906d2 100644
--- a/phpBB/install/install_update.php
+++ b/phpBB/install/install_update.php
@@ -366,7 +366,7 @@ class install_update extends module
 					$get_new_list = true;
 				}
 
-				if (!$get_new_list && $update_list['status'] != -1)
+				if (!$get_new_list && ($update_list['status'] != -1 || $update_list['status_deleted'] != -1))
 				{
 					$get_new_list = true;
 				}
@@ -377,17 +377,17 @@ class install_update extends module
 					$cache->put('_update_list', $update_list);
 
 					// Refresh the page if we are still not finished...
-					if ($update_list['status'] != -1)
+					if ($update_list['status'] != -1 || $update_list['status_deleted'] != -1)
 					{
 						$refresh_url = append_sid($this->p_master->module_url, "language=$language&amp;mode=$mode&amp;sub=file_check");
 						meta_refresh(2, $refresh_url);
 
 						$template->assign_vars(array(
 							'S_IN_PROGRESS'		=> true,
-							'S_COLLECTED'		=> (int) $update_list['status'],
+							'S_COLLECTED'		=> (int) $update_list['status'] + (int) $update_list['status_deleted'],
 							'S_TO_COLLECT'		=> sizeof($this->update_info['files']),
 							'L_IN_PROGRESS'				=> $user->lang['COLLECTING_FILE_DIFFS'],
-							'L_IN_PROGRESS_EXPLAIN'		=> sprintf($user->lang['NUMBER_OF_FILES_COLLECTED'], (int) $update_list['status'], sizeof($this->update_info['files'])),
+							'L_IN_PROGRESS_EXPLAIN'		=> sprintf($user->lang['NUMBER_OF_FILES_COLLECTED'], (int) $update_list['status'], sizeof($this->update_info['files']) + sizeof($this->update_info['deleted'])),
 						));
 
 						return;
@@ -413,7 +413,7 @@ class install_update extends module
 				// Now assign the list to the template
 				foreach ($update_list as $status => $filelist)
 				{
-					if ($status == 'no_update' || !sizeof($filelist) || $status == 'status')
+					if ($status == 'no_update' || !sizeof($filelist) || $status == 'status' || $status == 'status_deleted')
 					{
 						continue;
 					}
@@ -480,7 +480,7 @@ class install_update extends module
 				$all_up_to_date = true;
 				foreach ($update_list as $status => $filelist)
 				{
-					if ($status != 'up_to_date' && $status != 'custom' && $status != 'status' && sizeof($filelist))
+					if ($status != 'up_to_date' && $status != 'custom' && $status != 'status' && $status != 'status_deleted' && sizeof($filelist))
 					{
 						$all_up_to_date = false;
 						break;
@@ -822,7 +822,7 @@ class install_update extends module
 
 						foreach ($update_list as $status => $files)
 						{
-							if ($status == 'up_to_date' || $status == 'no_update' || $status == 'status')
+							if ($status == 'up_to_date' || $status == 'no_update' || $status == 'status' || $status == 'status_deleted')
 							{
 								continue;
 							}
@@ -1212,6 +1212,16 @@ class install_update extends module
 				$this->page_title = 'VIEWING_FILE_CONTENTS';
 
 			break;
+
+			case 'deleted':
+
+				$diff = $this->return_diff(array(), $phpbb_root_path . $original_file);
+
+				$template->assign_var('S_DIFF_NEW_FILE', true);
+				$diff_mode = 'inline';
+				$this->page_title = 'VIEWING_FILE_CONTENTS';
+
+			break;
 		}
 
 		$diff_mode_options = '';
@@ -1257,7 +1267,9 @@ class install_update extends module
 				'new_conflict'	=> array(),
 				'conflict'		=> array(),
 				'no_update'		=> array(),
+				'deleted'		=> array(),
 				'status'		=> 0,
+				'status_deleted'=> 0,
 			);
 		}
 
@@ -1337,6 +1349,30 @@ class install_update extends module
 		}
 
 		$update_list['status'] = -1;
+
+		foreach ($this->update_info['deleted'] as $index => $file)
+		{
+			if (is_int($update_list['status_deleted']) && $index < $update_list['status_deleted'])
+			{
+				continue;
+			}
+
+			if ($num_bytes_processed >= 500 * 1024)
+			{
+				return;
+			}
+
+			if (file_exists($phpbb_root_path . $file))
+			{
+				$update_list['deleted'][] = array('filename' => $file, 'custom' => false, 'as_expected' => false);
+				$num_bytes_processed += filesize($phpbb_root_path . $file);
+			}
+
+			$update_list['status_deleted']++;
+		}
+
+		$update_list['status_deleted'] = -1;
+
 /*		if (!sizeof($this->update_info['files']))
 		{
 			return $update_list;
diff --git a/phpBB/language/en/install.php b/phpBB/language/en/install.php
index caefc1219d..65c53c0d35 100644
--- a/phpBB/language/en/install.php
+++ b/phpBB/language/en/install.php
@@ -431,6 +431,8 @@ $lang = array_merge($lang, array(
 	'FILE_USED'						=> 'Information used from',			// Single file
 	'FILES_CONFLICT'				=> 'Conflict files',
 	'FILES_CONFLICT_EXPLAIN'		=> 'The following files are modified and do not represent the original files from the old version. phpBB determined that these files create conflicts if they are tried to be merged. Please investigate the conflicts and try to manually resolve them or continue the update choosing the preferred merging method. If you resolve the conflicts manually check the files again after you modified them. You are also able to choose between the preferred merge method for every file. The first one will result in a file where the conflicting lines from your old file will be lost, the other one will result in losing the changes from the newer file.',
+	'FILES_DELETED'					=> 'Deleted files',
+	'FILES_DELETED_EXPLAIN'			=> 'The following files do not exist in the new version. These files have to be deleted from your installation.',
 	'FILES_MODIFIED'				=> 'Modified files',
 	'FILES_MODIFIED_EXPLAIN'		=> 'The following files are modified and do not represent the original files from the old version. The updated file will be a merge between your modifications and the new file.',
 	'FILES_NEW'						=> 'New files',
@@ -501,6 +503,7 @@ $lang = array_merge($lang, array(
 	'SELECT_DOWNLOAD_FORMAT'	=> 'Select download archive format',
 	'SELECT_FTP_SETTINGS'		=> 'Select FTP settings',
 	'SHOW_DIFF_CONFLICT'		=> 'Show differences/conflicts',
+	'SHOW_DIFF_DELETED'			=> 'Show file contents',
 	'SHOW_DIFF_FINAL'			=> 'Show resulting file',
 	'SHOW_DIFF_MODIFIED'		=> 'Show merged differences',
 	'SHOW_DIFF_NEW'				=> 'Show file contents',
@@ -514,6 +517,7 @@ $lang = array_merge($lang, array(
 	'STAGE_UPDATE_FILES'		=> 'Update files',
 	'STAGE_VERSION_CHECK'		=> 'Version check',
 	'STATUS_CONFLICT'			=> 'Modified file producing conflicts',
+	'L_STATUS_DELETED'			=> 'Deleted file',
 	'STATUS_MODIFIED'			=> 'Modified file',
 	'STATUS_NEW'				=> 'New file',
 	'STATUS_NEW_CONFLICT'		=> 'Conflicting new file',