diff --git a/phpBB/docs/coding-guidelines.html b/phpBB/docs/coding-guidelines.html
index b5aeeccdc3..818f17246b 100644
--- a/phpBB/docs/coding-guidelines.html
+++ b/phpBB/docs/coding-guidelines.html
@@ -184,7 +184,7 @@ class ...
 		<li><strong>acp</strong><br /><code>/adm</code>, <code>/includes/acp</code>, <code>/includes/functions_admin.php</code><br />Administration Control Panel</li>
 		<li><strong>dbal</strong><br /><code>/includes/db</code><br />Database Abstraction Layer.<br />Base class is <code>dbal</code>
 			<ul>
-				<li><code>/includes/db/dbal.php</code><br />Base DBAL class, defining the overall framework as well as common detominators</li>
+				<li><code>/includes/db/dbal.php</code><br />Base DBAL class, defining the overall framework</li>
 				<li><code>/includes/db/firebird.php</code><br />Firebird/Interbase Database Abstraction Layer</li>
 				<li><code>/includes/db/msssql.php</code><br />MSSQL Database Abstraction Layer</li>
 				<li><code>/includes/db/mssql_odbc.php</code><br />MSSQL ODBC Database Abstraction Layer for MSSQL</li>
diff --git a/phpBB/includes/acp/acp_icons.php b/phpBB/includes/acp/acp_icons.php
index 97864d0e27..537c0425a2 100644
--- a/phpBB/includes/acp/acp_icons.php
+++ b/phpBB/includes/acp/acp_icons.php
@@ -89,15 +89,17 @@ class acp_icons
 			}
 			unset($imglist);
 
-			$dir = @opendir($phpbb_root_path . $img_path);
-			while (($file = @readdir($dir)) !== false)
+			if ($dir = @opendir($phpbb_root_path . $img_path))
 			{
-				if (is_file($phpbb_root_path . $img_path . '/' . $file) && preg_match('#\.pak$#i', $file))
+				while (($file = readdir($dir)) !== false)
 				{
-					$_paks[] = $file;
+					if (is_file($phpbb_root_path . $img_path . '/' . $file) && preg_match('#\.pak$#i', $file))
+					{
+						$_paks[] = $file;
+					}
 				}
+				closedir($dir);
 			}
-			@closedir($dir);
 		}
 
 		// What shall we do today? Oops, I believe that's trademarked ...
diff --git a/phpBB/includes/acp/acp_main.php b/phpBB/includes/acp/acp_main.php
index 06385fd97b..74369d2d92 100644
--- a/phpBB/includes/acp/acp_main.php
+++ b/phpBB/includes/acp/acp_main.php
@@ -322,7 +322,7 @@ class acp_main
 					$avatar_dir_size += filesize($phpbb_root_path . $config['avatar_path'] . '/' . $file);
 				}
 			}
-			@closedir($avatar_dir);
+			closedir($avatar_dir);
 
 			// This bit of code translates the avatar directory size into human readable format
 			// Borrowed the code from the PHP.net annoted manual, origanally written by:
diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index f4f7f8e56b..31e99a6b0c 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -637,7 +637,7 @@ parse_css_file = {PARSE_CSS_FILE}
 					}
 				}
 			}
-			@closedir($dp);
+			closedir($dp);
 		}
 
 		unset($installed);
@@ -1860,15 +1860,17 @@ parse_css_file = {PARSE_CSS_FILE}
 
 				$imageset_root = "{$phpbb_root_path}styles/{$style_row['imageset_path']}/imageset/";
 
-				$dh = @opendir($imageset_root);
-				while (($fname = readdir($dh)) !== false)
+				if ($dh = @opendir($imageset_root))
 				{
-					if ($fname[0] != '.' && $fname != 'CVS' && is_dir("$imageset_root$fname"))
+					while (($fname = readdir($dh)) !== false)
 					{
-						$files[key($files)]['exclude'] .= ',' . $fname . '/imageset.cfg';
+						if ($fname[0] != '.' && $fname != 'CVS' && is_dir("$imageset_root$fname"))
+						{
+							$files[key($files)]['exclude'] .= ',' . $fname . '/imageset.cfg';
+						}
 					}
+					closedir($dh);
 				}
-				@closedir($dh);
 
 				$imageset_lang = array();
 
diff --git a/phpBB/includes/functions_user.php b/phpBB/includes/functions_user.php
index b3be975d00..1c6a4a988f 100644
--- a/phpBB/includes/functions_user.php
+++ b/phpBB/includes/functions_user.php
@@ -1999,31 +1999,38 @@ function avatar_gallery($category, $avatar_select, $items_per_column, $block_var
 		// Collect images
 		$dp = @opendir($path);
 
+		if (!$dp)
+		{
+			return array($user->lang['NO_AVATAR_CATEGORY'] => array());
+		}
+
 		while (($file = readdir($dp)) !== false)
 		{
 			if ($file[0] != '.' && preg_match('#^[^&"\'<>]+$#i', $file) && is_dir("$path/$file"))
 			{
 				$avatar_row_count = $avatar_col_count = 0;
 	
-				$dp2 = @opendir("$path/$file");
-				while (($sub_file = readdir($dp2)) !== false)
+				if ($dp2 = @opendir("$path/$file"))
 				{
-					if (preg_match('#^[^&\'"<>]+\.(?:gif|png|jpe?g)$#i', $sub_file))
+					while (($sub_file = readdir($dp2)) !== false)
 					{
-						$avatar_list[$file][$avatar_row_count][$avatar_col_count] = array(
-							'file'		=> "$file/$sub_file",
-							'filename'	=> $sub_file,
-							'name'		=> ucfirst(str_replace('_', ' ', preg_replace('#^(.*)\..*$#', '\1', $sub_file))),
-						);
-						$avatar_col_count++;
-						if ($avatar_col_count == $items_per_column)
+						if (preg_match('#^[^&\'"<>]+\.(?:gif|png|jpe?g)$#i', $sub_file))
 						{
-							$avatar_row_count++;
-							$avatar_col_count = 0;
+							$avatar_list[$file][$avatar_row_count][$avatar_col_count] = array(
+								'file'		=> "$file/$sub_file",
+								'filename'	=> $sub_file,
+								'name'		=> ucfirst(str_replace('_', ' ', preg_replace('#^(.*)\..*$#', '\1', $sub_file))),
+							);
+							$avatar_col_count++;
+							if ($avatar_col_count == $items_per_column)
+							{
+								$avatar_row_count++;
+								$avatar_col_count = 0;
+							}
 						}
 					}
+					closedir($dp2);
 				}
-				closedir($dp2);
 			}
 		}
 		closedir($dp);
diff --git a/phpBB/install/install_install.php b/phpBB/install/install_install.php
index ca86816e9c..6fb2cd4881 100755
--- a/phpBB/install/install_install.php
+++ b/phpBB/install/install_install.php
@@ -8,11 +8,6 @@
 *
 */
 
-/**
-* @todo: check for those functions being 'available'? Though not able to check with function_exists, we need to create test cases
-* ini_get(), glob, getimagesize, fsockopen, readfile
-*/
-
 /**
 */
 if (!defined('IN_INSTALL'))