diff --git a/lib/documentmanagement/Document.inc b/lib/documentmanagement/Document.inc
index 9cbdf8e..e4c021b 100644
--- a/lib/documentmanagement/Document.inc
+++ b/lib/documentmanagement/Document.inc
@@ -200,7 +200,7 @@ class Document {
     // {{{ get
     function &get($iId, $iMetadataVersion=null) {
         if (!is_numeric($iId)) {
-            return PEAR::raiseError(_('Non-numeric identifier'));
+            return PEAR::raiseError(_kt('Non-numeric identifier'));
         }
         $iId = (int)$iId;
         $oDocument = new Document();
@@ -536,7 +536,7 @@ class Document {
     // {{{ startNewContentVersion
     function startNewContentVersion($oUser) {
         if ($this->getImmutable()) {
-            return PEAR::raiseError(_('Cannot create new version of document: Document is immutable'));
+            return PEAR::raiseError(_kt('Cannot create new version of document: Document is immutable'));
         }
         $iUserId = KTUtil::getId($oUser);
         $this->_oDocumentContentVersion =& $this->_oDocumentContentVersion->newCopy();
diff --git a/lib/ktentity.inc b/lib/ktentity.inc
index 7178440..00db621 100644
--- a/lib/ktentity.inc
+++ b/lib/ktentity.inc
@@ -629,7 +629,7 @@ class KTEntityUtil {
 
     function &get($sClassName, $iId) {
         if (!is_numeric($iId)) {
-            return PEAR::raiseError(_('Non-numeric identifier'));
+            return PEAR::raiseError(_kt('Non-numeric identifier'));
         }
         $iId = (int)$iId;
         /* */
diff --git a/lib/session/Session.inc b/lib/session/Session.inc
index 215a4d1..7260ce9 100644
--- a/lib/session/Session.inc
+++ b/lib/session/Session.inc
@@ -202,7 +202,7 @@ class Session {
         // check that ip matches
         $ip = $this->getClientIP();
         if ($ipTracking && ($ip != trim($aRow["ip"]))) {
-            return PEAR::raiseError(_("You are coming from a different IP address than the session requires"));
+            return PEAR::raiseError(_kt("You are coming from a different IP address than the session requires"));
         }
 
         // now check if the timeout has been exceeded
diff --git a/lib/validation/errorviewer.inc.php b/lib/validation/errorviewer.inc.php
index 359a4f1..527cf86 100644
--- a/lib/validation/errorviewer.inc.php
+++ b/lib/validation/errorviewer.inc.php
@@ -138,6 +138,7 @@ class KTDBErrorViewer extends KTErrorViewer {
         $ret .= "\t<dt>Error type</dt>\n";
         $ret .= "\t<dd>" . $this->oError->getMessage() . "</dd>\n";
         $sInfo = $this->parseUserInfo();
+
         if ($sInfo) {
             $ret .= "\t<dt>Additional information</dt>\n";
             $ret .= "\t<dd>" . $sInfo . "</dd>\n";
@@ -149,6 +150,7 @@ class KTDBErrorViewer extends KTErrorViewer {
     function parseUserInfo() {
         $sUserInfo = $this->oError->getUserInfo();
         $aMatches = array();
+
         if (preg_match("#^ ?\[nativecode=(Can't connect to local.*) \(13\)#", $sUserInfo, $aMatches)) {
             return $aMatches[1];
         }