diff -r 80cd75daf80f -r 7764cbe4ddd7 QTfrontend/ui/widget/SmartLineEdit.cpp
--- a/QTfrontend/ui/widget/SmartLineEdit.cpp	Tue Oct 25 13:30:02 2011 +0400
+++ b/QTfrontend/ui/widget/SmartLineEdit.cpp	Tue Oct 25 19:46:59 2011 +0200
@@ -53,61 +53,41 @@
 
 void SmartLineEdit::addCommands(const QStringList & commands)
 {
-    m_keywordMutex.lock();
-
     m_cmds->append(commands);
-
-    m_keywordMutex.unlock();
 }
 
 
 void SmartLineEdit::removeCommands(const QStringList & commands)
 {
-    m_keywordMutex.lock();
-
     foreach (const QString & cmd, commands)
     {
         m_cmds->removeAll(cmd);
     }
-
-    m_keywordMutex.unlock();
 }
 
 
 void SmartLineEdit::addNickname(const QString & name)
 {
-    m_keywordMutex.lock();
-
     m_sorted_nicks->insert(name.toLower(), name);
     m_nicks->append(name);
-
-    m_keywordMutex.unlock();
 }
 
 
 void SmartLineEdit::removeNickname(const QString & name)
 {
-    m_keywordMutex.lock();
-
     m_sorted_nicks->remove(name.toLower());
     m_nicks->removeAll(name);
-
-    m_keywordMutex.unlock();
 }
 
 
 void SmartLineEdit::reset()
 {
     // forget keywords
-    m_keywordMutex.lock();
-
     m_cmds->clear();
     m_sorted_nicks->clear();
     m_nicks->clear();
     resetAutoCompletionStatus();
 
-    m_keywordMutex.unlock();
-
     // forget history
     HistoryLineEdit::reset();
 }
@@ -173,10 +153,8 @@
     }
     else
     {
-        m_keywordMutex.lock();
         m_cmds->sort();
         m_nicks = new QStringList(m_sorted_nicks->values());
-        m_keywordMutex.unlock();
 
         int cp = cursorPosition();
 
@@ -211,8 +189,6 @@
     }
 
 
-    m_keywordMutex.lock();
-
     if (isFirstWord)
     {
         // find matching commands
@@ -250,8 +226,6 @@
         }
     }
 
-    m_keywordMutex.unlock();
-
     // we found a single match?
     if (!match.isEmpty())
     {