diff -r 2cd9bcca0d9d -r 98b806c1793d QTfrontend/ui/widget/chatwidget.cpp
--- a/QTfrontend/ui/widget/chatwidget.cpp	Thu Nov 01 01:05:35 2012 +0100
+++ b/QTfrontend/ui/widget/chatwidget.cpp	Mon Nov 21 21:23:23 2011 +0100
@@ -532,9 +532,9 @@
     QString hlRegExp("^(.* )?%1[^-a-z0-9_]*( .*)?$");
     QRegExp whitespace("\\s");
 
-    m_highlights.append(QRegExp(hlRegExp.arg(m_userNick)));
+    m_highlights.append(QRegExp(hlRegExp.arg(m_userNick.toLower())));
 
-    QFile file(cfgdir->absolutePath() + "/" + m_userNick + "_highlight.txt");
+    QFile file(cfgdir->absolutePath() + "/" + m_userNick.toLower() + "_highlight.txt");
 
     if (file.exists() && (file.open(QIODevice::ReadOnly | QIODevice::Text)))
     {
@@ -554,7 +554,7 @@
             file.close();
     }
 
-    QFile file2(cfgdir->absolutePath() + "/" + m_userNick + "_hlregexp.txt");
+    QFile file2(cfgdir->absolutePath() + "/" + m_userNick.toLower() + "_hlregexp.txt");
 
     if (file2.exists() && (file2.open(QIODevice::ReadOnly | QIODevice::Text)))
     {