diff --git a/config.cc b/config.cc
index c035c77c..5d373ab7 100644
--- a/config.cc
+++ b/config.cc
@@ -143,17 +143,17 @@ Romaji::Romaji():
 
 Group * Class::getGroup( unsigned id )
 {
-  for( unsigned x = 0; x < groups.size(); x++ )
-    if( groups[ x ].id == id )
+  for( int x = 0; x < groups.size(); x++ )
+    if( groups.at( x ).id == id )
       return &groups[ x ];
   return 0;
 }
 
 Group const * Class::getGroup( unsigned id ) const
 {
-  for( unsigned x = 0; x < groups.size(); x++ )
-    if( groups[ x ].id == id )
-      return &groups[ x ];
+  for( int x = 0; x < groups.size(); x++ )
+    if( groups.at( x ).id == id )
+      return &groups.at( x );
   return 0;
 }
 
@@ -795,7 +795,7 @@ void saveGroup( Group const & data, QDomElement & group )
     group.setAttributeNode( shortcut );
   }
 
-  for( vector< DictionaryRef >::const_iterator j = data.dictionaries.begin(); j != data.dictionaries.end(); ++j )
+  for( QVector< DictionaryRef >::const_iterator j = data.dictionaries.begin(); j != data.dictionaries.end(); ++j )
   {
     QDomElement dictionary = dd.createElement( "dictionary" );
 
@@ -924,10 +924,10 @@ void save( Class const & c ) throw( exError )
     hunspell.setAttributeNode( path );
     root.appendChild( hunspell );
 
-    for( unsigned x = 0; x < c.hunspell.enabledDictionaries.size(); ++x )
+    for( int x = 0; x < c.hunspell.enabledDictionaries.size(); ++x )
     {
       QDomElement en = dd.createElement( "enabled" );
-      QDomText value = dd.createTextNode( c.hunspell.enabledDictionaries[ x ] );
+      QDomText value = dd.createTextNode( c.hunspell.enabledDictionaries.at( x ) );
 
       en.appendChild( value );
       hunspell.appendChild( en );
diff --git a/config.hh b/config.hh
index 830d3474..b4d2e577 100644
--- a/config.hh
+++ b/config.hh
@@ -4,7 +4,7 @@
 #ifndef __CONFIG_HH_INCLUDED__
 #define __CONFIG_HH_INCLUDED__
 
-#include <vector>
+#include <QVector>
 #include <QString>
 #include <QSize>
 #include <QDateTime>
@@ -15,8 +15,6 @@
 /// GoldenDict's configuration
 namespace Config {
 
-using std::vector;
-
 /// Dictionaries which are temporarily disabled via the dictionary bar.
 typedef QSet< QString > MutedDictionaries;
 
@@ -39,7 +37,7 @@ struct Path
 };
 
 /// A list of paths where to search for the dictionaries
-typedef vector< Path > Paths;
+typedef QVector< Path > Paths;
 
 /// A directory holding bunches of audiofiles, which is indexed into a separate
 /// dictionary.
@@ -59,7 +57,7 @@ struct SoundDir
 };
 
 /// A list of SoundDirs
-typedef vector< SoundDir > SoundDirs;
+typedef QVector< SoundDir > SoundDirs;
 
 struct DictionaryRef
 {
@@ -83,7 +81,7 @@ struct Group
   QString name, icon;
   QByteArray iconData;
   QKeySequence shortcut;
-  vector< DictionaryRef > dictionaries;
+  QVector< DictionaryRef > dictionaries;
   Config::MutedDictionaries mutedDictionaries; // Disabled via dictionary bar
   Config::MutedDictionaries popupMutedDictionaries; // Disabled via dictionary bar in popup
 
@@ -101,7 +99,7 @@ struct Group
 };
 
 /// All the groups
-struct Groups: public vector< Group >
+struct Groups: public QVector< Group >
 {
   unsigned nextId; // Id to use to create the group next time
 
@@ -239,14 +237,14 @@ struct WebSite
 };
 
 /// All the WebSites
-typedef vector< WebSite > WebSites;
+typedef QVector< WebSite > WebSites;
 
 /// Hunspell configuration
 struct Hunspell
 {
   QString dictionariesPath;
 
-  typedef vector< QString > Dictionaries;
+  typedef QVector< QString > Dictionaries;
 
   Dictionaries enabledDictionaries;
 
@@ -259,7 +257,7 @@ struct Hunspell
 };
 
 /// All the MediaWikis
-typedef vector< MediaWiki > MediaWikis;
+typedef QVector< MediaWiki > MediaWikis;
 
 /// Romaji transliteration configuration
 struct Romaji
@@ -364,7 +362,7 @@ struct Program
   { return ! operator == ( other ); }
 };
 
-typedef vector< Program > Programs;
+typedef QVector< Program > Programs;
 
 struct Class
 {
diff --git a/groups.cc b/groups.cc
index 439215c5..3769a0c8 100644
--- a/groups.cc
+++ b/groups.cc
@@ -48,7 +48,7 @@ Groups::Groups( QWidget * parent,
 
 void Groups::editGroup( unsigned id )
 {
-  for( unsigned x = 0; x < groups.size(); ++x )
+  for( int x = 0; x < groups.size(); ++x )
   {
     if ( groups[ x ].id == id )
     {
diff --git a/groups_widgets.cc b/groups_widgets.cc
index d1edddb0..b46a0709 100644
--- a/groups_widgets.cc
+++ b/groups_widgets.cc
@@ -497,7 +497,7 @@ void DictGroupsWidget::populate( Config::Groups const & groups,
 
   allDicts = &allDicts_;
 
-  for( unsigned x = 0; x < groups.size(); ++x )
+  for( int x = 0; x < groups.size(); ++x )
     addTab( new DictGroupWidget( this, *allDicts, groups[ x ] ), escapeAmps( groups[ x ].name ) );
 
   nextId = groups.nextId;
diff --git a/hunspell.cc b/hunspell.cc
index 7d7a7113..44669c63 100644
--- a/hunspell.cc
+++ b/hunspell.cc
@@ -688,7 +688,7 @@ vector< sptr< Dictionary::Class > > makeDictionaries( Config::Hunspell const & c
   vector< DataFiles > dataFiles = findDataFiles( cfg.dictionariesPath );
 
 
-  for( unsigned x = 0; x < cfg.enabledDictionaries.size(); ++x )
+  for( int x = 0; x < cfg.enabledDictionaries.size(); ++x )
   {
     for( unsigned d = dataFiles.size(); d--; )
     {
diff --git a/instances.cc b/instances.cc
index 5982c31e..a9af71ae 100644
--- a/instances.cc
+++ b/instances.cc
@@ -20,7 +20,7 @@ Group::Group( Config::Group const & cfgGroup,
   if ( !cfgGroup.iconData.isEmpty() )
     iconData = iconFromData( cfgGroup.iconData );
 
-  for( unsigned x = 0; x < cfgGroup.dictionaries.size(); ++x )
+  for( unsigned x = 0; x < (unsigned)cfgGroup.dictionaries.size(); ++x )
   {
     std::string id = cfgGroup.dictionaries[ x ].id.toStdString();
 
@@ -53,10 +53,10 @@ Group::Group( Config::Group const & cfgGroup,
         if( n < dictionaries.size() )
           continue;
 
-        for( n = x + 1; n < cfgGroup.dictionaries.size(); n++ )
+        for( n = x + 1; n < (unsigned)cfgGroup.dictionaries.size(); n++ )
           if( cfgGroup.dictionaries[ n ].name == qname )
             break;
-        if( n < cfgGroup.dictionaries.size() )
+        if( n < (unsigned)cfgGroup.dictionaries.size() )
           continue;
 
         for( unsigned y = 0; y < allDictionaries.size(); ++y )
@@ -179,7 +179,7 @@ void updateNames( Config::Group & group,
 void updateNames( Config::Groups & groups,
                   vector< sptr< Dictionary::Class > > const & allDictionaries )
 {
-  for( unsigned x = 0; x < groups.size(); ++x )
+  for( int x = 0; x < groups.size(); ++x )
     updateNames( groups[ x ], allDictionaries );
 }
 
diff --git a/mainwindow.cc b/mainwindow.cc
index 695fc104..b2c858ed 100644
--- a/mainwindow.cc
+++ b/mainwindow.cc
@@ -826,7 +826,7 @@ void MainWindow::updateGroupList()
     groupInstances.push_back( g );
   }
 
-  for( unsigned x  = 0; x < cfg.groups.size(); ++x )
+  for( int x  = 0; x < cfg.groups.size(); ++x )
     groupInstances.push_back( Instances::Group( cfg.groups[ x ], dictionaries ) );
 
   // Update names for dictionaries that are present, so that they could be
@@ -1382,7 +1382,7 @@ void MainWindow::editDictionaries( unsigned editDictionaryGroup )
   {
 
     // Set muted dictionaries from old groups
-    for( unsigned x = 0; x < newCfg.groups.size(); x++ )
+    for( int x = 0; x < newCfg.groups.size(); x++ )
     {
       unsigned id = newCfg.groups[ x ].id;
       if( id != Instances::Group::NoGroupId )
diff --git a/mediawiki.cc b/mediawiki.cc
index 9860122a..a44cabf8 100644
--- a/mediawiki.cc
+++ b/mediawiki.cc
@@ -422,7 +422,7 @@ vector< sptr< Dictionary::Class > > makeDictionaries(
 {
   vector< sptr< Dictionary::Class > > result;
 
-  for( unsigned x = 0; x < wikis.size(); ++x )
+  for( int x = 0; x < wikis.size(); ++x )
   {
     if ( wikis[ x ].enabled )
       result.push_back( new MediaWikiDictionary( wikis[ x ].id.toStdString(),
diff --git a/sources.cc b/sources.cc
index 14946ea9..dc69fc60 100644
--- a/sources.cc
+++ b/sources.cc
@@ -406,7 +406,7 @@ QVariant MediaWikisModel::headerData( int section, Qt::Orientation /*orientation
 
 QVariant MediaWikisModel::data( QModelIndex const & index, int role ) const
 {
-  if ( (unsigned)index.row() >= mediawikis.size() )
+  if ( index.row() >= mediawikis.size() )
     return QVariant();
 
   if ( role == Qt::DisplayRole || role == Qt::EditRole )
@@ -433,7 +433,7 @@ QVariant MediaWikisModel::data( QModelIndex const & index, int role ) const
 bool MediaWikisModel::setData( QModelIndex const & index, const QVariant & value,
                                int role )
 {
-  if ( (unsigned)index.row() >= mediawikis.size() )
+  if ( index.row() >= mediawikis.size() )
     return false;
 
   if ( role == Qt::CheckStateRole && !index.column() )
@@ -563,7 +563,7 @@ QVariant WebSitesModel::headerData( int section, Qt::Orientation /*orientation*/
 
 QVariant WebSitesModel::data( QModelIndex const & index, int role ) const
 {
-  if ( (unsigned)index.row() >= webSites.size() )
+  if ( index.row() >= webSites.size() )
     return QVariant();
 
   if ( role == Qt::DisplayRole || role == Qt::EditRole )
@@ -590,7 +590,7 @@ QVariant WebSitesModel::data( QModelIndex const & index, int role ) const
 bool WebSitesModel::setData( QModelIndex const & index, const QVariant & value,
                                int role )
 {
-  if ( (unsigned)index.row() >= webSites.size() )
+  if ( index.row() >= webSites.size() )
     return false;
 
   if ( role == Qt::CheckStateRole && !index.column() )
@@ -722,7 +722,7 @@ QVariant ProgramsModel::headerData( int section, Qt::Orientation /*orientation*/
 
 QVariant ProgramsModel::data( QModelIndex const & index, int role ) const
 {
-  if ( (unsigned) index.row() >= programs.size() )
+  if ( index.row() >= programs.size() )
     return QVariant();
 
   if ( role == Qt::DisplayRole || role == Qt::EditRole )
@@ -754,7 +754,7 @@ QVariant ProgramsModel::data( QModelIndex const & index, int role ) const
 bool ProgramsModel::setData( QModelIndex const & index, const QVariant & value,
                              int role )
 {
-  if ( (unsigned)index.row() >= programs.size() )
+  if ( index.row() >= programs.size() )
     return false;
 
   if ( role == Qt::CheckStateRole && !index.column() )
@@ -900,7 +900,7 @@ QVariant PathsModel::headerData( int section, Qt::Orientation /*orientation*/, i
 
 QVariant PathsModel::data( QModelIndex const & index, int role ) const
 {
-  if ( (unsigned)index.row() >= paths.size() )
+  if ( index.row() >= paths.size() )
     return QVariant();
 
   if ( ( role == Qt::DisplayRole || role == Qt::EditRole ) && !index.column() )
@@ -915,7 +915,7 @@ QVariant PathsModel::data( QModelIndex const & index, int role ) const
 bool PathsModel::setData( QModelIndex const & index, const QVariant & /*value*/,
                           int role )
 {
-  if ( (unsigned)index.row() >= paths.size() )
+  if ( index.row() >= paths.size() )
     return false;
 
   if ( role == Qt::CheckStateRole && index.column() == 1 )
@@ -1006,7 +1006,7 @@ QVariant SoundDirsModel::headerData( int section, Qt::Orientation /*orientation*
 
 QVariant SoundDirsModel::data( QModelIndex const & index, int role ) const
 {
-  if ( (unsigned)index.row() >= soundDirs.size() )
+  if ( index.row() >= soundDirs.size() )
     return QVariant();
 
   if ( ( role == Qt::DisplayRole || role == Qt::EditRole ) && !index.column() )
@@ -1021,7 +1021,7 @@ QVariant SoundDirsModel::data( QModelIndex const & index, int role ) const
 bool SoundDirsModel::setData( QModelIndex const & index, const QVariant & value,
                               int role )
 {
-  if ( (unsigned)index.row() >= soundDirs.size() )
+  if ( index.row() >= soundDirs.size() )
     return false;
 
   if ( ( role == Qt::DisplayRole || role == Qt::EditRole ) && index.column() < 2 )
diff --git a/website.cc b/website.cc
index 68b8f7c0..489578a5 100644
--- a/website.cc
+++ b/website.cc
@@ -142,7 +142,7 @@ vector< sptr< Dictionary::Class > > makeDictionaries( Config::WebSites const & w
 {
   vector< sptr< Dictionary::Class > > result;
 
-  for( unsigned x = 0; x < ws.size(); ++x )
+  for( int x = 0; x < ws.size(); ++x )
   {
     if ( ws[ x ].enabled )
       result.push_back( new WebSiteDictionary( ws[ x ].id.toUtf8().data(),