Index: wp-includes/class-simplepie.php
===================================================================
--- wp-includes/class-simplepie.php	(revision 18071)
+++ wp-includes/class-simplepie.php	(working copy)
@@ -13105,7 +13105,7 @@
 	/**
 	 * Parse a superset of W3C-DTF (allows hyphens and colons to be omitted, as
 	 * well as allowing any of upper or lower case "T", horizontal tabs, or
-	 * spaces to be used as the time seperator (including more than one))
+	 * spaces to be used as the time separator (including more than one))
 	 *
 	 * @access protected
 	 * @return int Timestamp
Index: wp-admin/includes/plugin.php
===================================================================
--- wp-admin/includes/plugin.php	(revision 18071)
+++ wp-admin/includes/plugin.php	(working copy)
@@ -702,7 +702,7 @@
 
 		$this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin_file) );
 		// If plugin is in its own directory, recursively delete the directory.
-		if ( strpos($plugin_file, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory seperator AND that its not the root plugin folder
+		if ( strpos($plugin_file, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that its not the root plugin folder
 			$deleted = $wp_filesystem->delete($this_plugin_dir, true);
 		else
 			$deleted = $wp_filesystem->delete($plugins_dir . $plugin_file);
Index: wp-admin/includes/menu.php
===================================================================
--- wp-admin/includes/menu.php	(revision 18071)
+++ wp-admin/includes/menu.php	(working copy)
@@ -121,18 +121,18 @@
 }
 unset($id, $data, $subs, $first_sub);
 
-// Remove any duplicated seperators
-$seperator_found = false;
+// Remove any duplicated separators
+$separator_found = false;
 foreach ( $menu as $id => $data ) {
 	if ( 0 == strcmp('wp-menu-separator', $data[4] ) ) {
-		if (false == $seperator_found) {
-			$seperator_found = true;
+		if (false == $separator_found) {
+			$separator_found = true;
 		} else {
 			unset($menu[$id]);
-			$seperator_found = false;
+			$separator_found = false;
 		}
 	} else {
-		$seperator_found = false;
+		$separator_found = false;
 	}
 }
 unset($id, $data);
Index: wp-admin/includes/class-wp-upgrader.php
===================================================================
--- wp-admin/includes/class-wp-upgrader.php	(revision 18071)
+++ wp-admin/includes/class-wp-upgrader.php	(working copy)
@@ -580,7 +580,7 @@
 			return $removed;
 
 		// If plugin is in its own directory, recursively delete the directory.
-		if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory seperator AND that its not the root plugin folder
+		if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that its not the root plugin folder
 			$deleted = $wp_filesystem->delete($this_plugin_dir, true);
 		else
 			$deleted = $wp_filesystem->delete($plugins_dir . $plugin);