diff --git a/include/stack.cpp b/include/stack.cpp
index 4236ff230..ba9da8ea8 100755
--- a/include/stack.cpp
+++ b/include/stack.cpp
@@ -25,6 +25,12 @@ TObject& TStack::peek(int depth) const
   return _data[_sp-depth-1];
 }
 
+void TStack::destroy()
+{
+  _data.destroy();
+  _sp = 0;
+}
+
 bool TStack::destroy_base()
 {
   if (_sp > 0) _sp--;
diff --git a/include/stack.h b/include/stack.h
index d14872c52..1f87ad974 100755
--- a/include/stack.h
+++ b/include/stack.h
@@ -34,6 +34,8 @@ public:
   TObject& pop();       
   // @cmember Ritorna l'oggetto ad una data profondita' nello stack
   TObject& peek(int depth = 0) const;                         
+  // @cmember Distrugge l'intero stack
+  void destroy();
   // @cmember Distrugge l'oggetto alla base dello stack
   bool destroy_base();
   // @cmember Costruttore. Chiama il costruttore di <c TArray>
diff --git a/include/strings.cpp b/include/strings.cpp
index d0d9440fb..b3f2f9b71 100755
--- a/include/strings.cpp
+++ b/include/strings.cpp
@@ -118,7 +118,7 @@ void TString::resize(
   else *s = '\0';
 
   if (_str)
-    delete [] _str;
+    delete _str;
 
   _str  = s;
   _size = size;
@@ -193,7 +193,7 @@ TString::TString() : _str(NULL), _size(0)
 TString::~TString()
 {
   if (_str)
-    delete [] _str;
+    delete _str;
 }
 
 char TString::shift(int n)
diff --git a/include/strings.h b/include/strings.h
index 6c44ba2cd..4e3695095 100755
--- a/include/strings.h
+++ b/include/strings.h
@@ -317,12 +317,18 @@ public:
   // @cmember Costruttore
   TString16(const TString& s) : TFixed_string(_str16, 17)
   { set(s); }
+  // @cmember Costruttore
+  TString16(const TString16& s) : TFixed_string(_str16, 17)
+  { set(s); }
+  // @cmember Assegna una stringa
+  const TString& operator =(const char* s)
+  { return set(s); }
   // @cmember Assegna una stringa
   const TString& operator =(const TString& s)
   { return set((const char*)s); }
   // @cmember Assegna una stringa
-  const TString& operator =(const char* s)
-  { return set(s); }
+  const TString& operator =(const TString16& s)
+  { return set((const char*)s); }
 
   // @comm Sono definite anche le classi <c TString80> e <c TString256> per le
   //       stringhe rispettivamente di 80 e 256 caratteri. I class member sono
@@ -346,8 +352,10 @@ class TString80 : public TFixed_string
 public:
   TString80(const char* s = "") : TFixed_string(_str80, 81) { set(s); }
   TString80(const TString& s) : TFixed_string(_str80, 81) { set(s); }
+  TString80(const TString80& s) : TFixed_string(_str80, 81) { set(s); }
   const TString& operator =(const char* s) { return set(s); }
   const TString& operator =(const TString& s) { return set((const char*)s); }
+  const TString& operator =(const TString80& s) { return set((const char*)s); }
 };
 
 // @doc EXTERNAL
@@ -367,8 +375,10 @@ class TString256 : public TFixed_string
 public:
   TString256(const char* s = "") : TFixed_string(_str256, 257) { set(s); }
   TString256(const TString& s) : TFixed_string(_str256, 257) { set(s); }
+  TString256(const TString256& s) : TFixed_string(_str256, 257) { set(s); }
   const TString& operator =(const char* s) { return set(s); }
   const TString& operator =(const TString& s) { return set((const char*)s); }
+  const TString& operator =(const TString256& s) { return set((const char*)s); }
 };
 
 // @doc EXTERNAL
diff --git a/include/tree.cpp b/include/tree.cpp
index e86e79e9e..058451bb3 100755
--- a/include/tree.cpp
+++ b/include/tree.cpp
@@ -797,10 +797,14 @@ class TTree_window : public TField_window
   TNode_info_array _node_info;
   TNode_info _curr_info;   // Nodo attualmente selezionato
 
+  static int _row_height;
+
 protected: // TWindow
   virtual void update();
   virtual bool on_key(KEY key);
   virtual void handler(WINDOW win, EVENT* ep);
+  PNT log2dev(long x, long y) const;
+  TPoint dev2log(const PNT& p) const;
 
 protected: // Internal use
   static bool callback_draw_node(TTree& node, void* jolly, word);
@@ -820,6 +824,10 @@ public:
   virtual ~TTree_window() { }
 };
 
+int TTree_window::_row_height = CHARY+2;
+
+const int TABX = 3;
+
 struct TUpdate_info
 {                  
   TTree_window* _win;
@@ -831,7 +839,40 @@ struct TUpdate_info
   TNode_info* _curr_info;
 };
 
-const int TABX = 3;
+
+PNT TTree_window::log2dev(long x, long y) const
+{
+  if (autoscrolling())
+  {      
+    if (_pixmap)
+    {
+      x -= origin().x * CHARX;
+      y -= origin().y * _row_height;
+    }
+    else
+    {
+      x -= origin().x;
+      y -= origin().y;
+    } 
+  }
+
+  PNT pnt; pnt.h = (int)x; pnt.v = (int)y;
+
+  if (!_pixmap)
+  {
+    pnt.h *= CHARX;
+    pnt.v *= _row_height;
+  }
+  
+  return pnt;
+}
+
+TPoint TTree_window::dev2log(const PNT& p) const
+{
+  TPoint pnt(_pixmap ? p.h : p.h/CHARX, _pixmap ? p.v : p.v/_row_height);
+  return pnt;
+}
+
 
 bool TTree_window::callback_draw_node(TTree& node, void* jolly, word when)
 {
@@ -873,16 +914,16 @@ bool TTree_window::callback_draw_node(TTree& node, void* jolly, word when)
       ui->_win->set_pen(DISABLED_COLOR);
       
       PNT q;
-      q.h = p.h; q.v = p.v + CHARY/2;
+      q.h = p.h; q.v = p.v + _row_height/2;
       xvt_dwin_draw_set_pos(win, q);
       q.h -= TABX*CHARX - 3*CHARX/2;
       xvt_dwin_draw_line(win, q);
-      q.v = (by+1)*CHARY;
+      q.v = (by+1)*_row_height;
       xvt_dwin_draw_line(win, q);
       
       TImage* bmp = node.image(is_selected); 
       if (bmp)
-        bmp->draw(win, p.h, p.v + (CHARY - bmp->height()) / 2);
+        bmp->draw(win, p.h, p.v + (_row_height - bmp->height()) / 2);
       
       TNode_info& ni = (*ui->_node_info)[ry];
       node.curr_id(ni._id);
@@ -945,7 +986,7 @@ void TTree_window::draw_plus_minus()
     
       WINDOW w = win();
       PNT r = log2dev(ni._plusx, firsty + i);
-      r.v += CHARY/2;
+      r.v += _row_height/2;
       r.h += CHARX/2;
       
       RCT rct; 
@@ -1182,7 +1223,9 @@ void TTree_window::handler(WINDOW win, EVENT* ep)
     if (_tree)
     {
       const int c = ep->v.mouse.where.h / CHARX;
-      const int r = ep->v.mouse.where.v / CHARY;
+      const int r = ep->v.mouse.where.v / _row_height;
+      dev2log(ep->v.mouse.where);
+      
       TNode_info ni;
       bool ok = index2info(r, ni);
       if (ok && (c == ni._plusx || (c >= ni._startx && c < ni._endx)) && 
@@ -1220,8 +1263,10 @@ void TTree_window::handler(WINDOW win, EVENT* ep)
 
 TTree_window::TTree_window(int x, int y, int dx, int dy, 
                            WINDOW parent, TTree_field* owner)          
-            : TField_window(x, y, dx, dy, parent, owner), _tree(NULL), _hide_leaves(FALSE)
+            : TField_window(x, y, dx, dy, parent, owner), _tree(NULL), 
+              _hide_leaves(FALSE)
 {                               
+  _row_height = CHARY+2;
 }
 
 ///////////////////////////////////////////////////////////
diff --git a/include/urldefid.h b/include/urldefid.h
index fd11cce7e..5555664ed 100755
--- a/include/urldefid.h
+++ b/include/urldefid.h
@@ -81,6 +81,7 @@
 #define BMP_DIR       167
 #define BMP_DIRDN     168
 #define BMP_FILE      169
+#define BMP_STOP      170
 
 #endif
 
diff --git a/include/window.cpp b/include/window.cpp
index 88d96a78f..51a2b396a 100755
--- a/include/window.cpp
+++ b/include/window.cpp
@@ -744,7 +744,9 @@ TPoint TWindow::size() const
 {
   RCT r;
   xvt_vobj_get_client_rect(win() ? win() : TASK_WIN, &r);
-  return TPoint(r.right / CHARX, r.bottom / CHARY);
+//  return TPoint(r.right / CHARX, r.bottom / CHARY);
+  PNT p; p.h = r.right; p.v = r.bottom;
+  return dev2log(p);
 }
 
 WINDOW TWindow::parent() const
@@ -752,7 +754,6 @@ WINDOW TWindow::parent() const
   return xvt_vobj_get_parent(win());
 }
 
-
 void TWindow::set_focus()
 { 
   WINDOW w = win();