diff --git a/src/editdictionaries.cc b/src/editdictionaries.cc
index 0ab182d1..2d282dd7 100644
--- a/src/editdictionaries.cc
+++ b/src/editdictionaries.cc
@@ -9,8 +9,10 @@ using std::vector;
 
 EditDictionaries::EditDictionaries( QWidget * parent, Config::Class & cfg_,
                                     vector< sptr< Dictionary::Class > > & dictionaries_,
+                                    Instances::Groups & groupInstances_,
                                     QNetworkAccessManager & dictNetMgr_ ):
   QDialog( parent ), cfg( cfg_ ), dictionaries( dictionaries_ ),
+  groupInstances( groupInstances_ ),
   dictNetMgr( dictNetMgr_ ),
   origCfg( cfg ),
   sources( this, cfg.paths, cfg.soundDirs, cfg.hunspell, cfg.transliteration,
@@ -121,6 +123,9 @@ void EditDictionaries::acceptChangedSources()
   cfg.transliteration = sources.getTransliteration();
   cfg.mediawikis = sources.getMediaWikis();
 
+  groupInstances.clear(); // Those hold pointers to dictionaries, we need to
+                          // free them.
+  
   loadDictionaries( this, true, cfg, dictionaries, dictNetMgr );
 }
 
diff --git a/src/editdictionaries.hh b/src/editdictionaries.hh
index 35e2de3e..e9944bcd 100644
--- a/src/editdictionaries.hh
+++ b/src/editdictionaries.hh
@@ -9,6 +9,7 @@
 #include "ui_editdictionaries.h"
 #include "sources.hh"
 #include "groups.hh"
+#include "instances.hh"
 #include <QNetworkAccessManager>
 
 class EditDictionaries: public QDialog
@@ -19,6 +20,7 @@ public:
 
   EditDictionaries( QWidget * parent, Config::Class & cfg,
                     std::vector< sptr< Dictionary::Class > > & dictionaries,
+                    Instances::Groups & groupInstances, // We only clear those on rescan
                     QNetworkAccessManager & dictNetMgr );
 
   /// Returns true if any changes to the 'dictionaries' vector passed were done.
@@ -51,6 +53,7 @@ private:
    
   Config::Class & cfg;
   std::vector< sptr< Dictionary::Class > > & dictionaries;
+  Instances::Groups & groupInstances;
   QNetworkAccessManager & dictNetMgr;
   
   // Backed up to decide later if something was changed or not
diff --git a/src/mainwindow.cc b/src/mainwindow.cc
index cbb5735a..87bfc65a 100644
--- a/src/mainwindow.cc
+++ b/src/mainwindow.cc
@@ -627,7 +627,7 @@ void MainWindow::editDictionaries()
   hotkeyWrapper.reset(); // No hotkeys while we're editing dictionaries
   scanPopup.reset(); // No scan popup either. No one should use dictionaries.
 
-  EditDictionaries dicts( this, cfg, dictionaries, dictNetMgr );
+  EditDictionaries dicts( this, cfg, dictionaries, groupInstances, dictNetMgr );
 
   dicts.exec();
 
@@ -1389,6 +1389,8 @@ void MainWindow::on_rescanFiles_activated()
   hotkeyWrapper.reset(); // No hotkeys while we're editing dictionaries
   scanPopup.reset(); // No scan popup either. No one should use dictionaries.
 
+  groupInstances.clear(); // Release all the dictionaries they hold
+
   loadDictionaries( this, true, cfg, dictionaries, dictNetMgr );
   
   updateGroupList();