diff --git a/rtdata/themes/09-Gray-Orange.gtkrc b/rtdata/themes/09-Gray-Orange.gtkrc
index 11b82bb25..e08fd939c 100644
--- a/rtdata/themes/09-Gray-Orange.gtkrc
+++ b/rtdata/themes/09-Gray-Orange.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = @rt_base_color
 }
@@ -454,6 +463,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/17-Gray-Red.gtkrc b/rtdata/themes/17-Gray-Red.gtkrc
index 6ff72761c..8bce5f943 100644
--- a/rtdata/themes/17-Gray-Red.gtkrc
+++ b/rtdata/themes/17-Gray-Red.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = shade (0.80, @rt_bg_color)
 }
@@ -454,6 +463,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/21-Gray-Gray.gtkrc b/rtdata/themes/21-Gray-Gray.gtkrc
index f7c723732..7c36d98d8 100644
--- a/rtdata/themes/21-Gray-Gray.gtkrc
+++ b/rtdata/themes/21-Gray-Gray.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = @rt_base_color
 }
@@ -465,6 +474,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/25-Gray-Gray.gtkrc b/rtdata/themes/25-Gray-Gray.gtkrc
index a75ddbbe9..a3cf6d1ff 100644
--- a/rtdata/themes/25-Gray-Gray.gtkrc
+++ b/rtdata/themes/25-Gray-Gray.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = shade (0.80, @rt_bg_color)
 }
@@ -454,6 +463,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/25-Gray-Purple.gtkrc b/rtdata/themes/25-Gray-Purple.gtkrc
index e571b08e9..a50cf093f 100644
--- a/rtdata/themes/25-Gray-Purple.gtkrc
+++ b/rtdata/themes/25-Gray-Purple.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = shade (0.80, @rt_bg_color)
 }
@@ -454,6 +463,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/25-Gray-Red.gtkrc b/rtdata/themes/25-Gray-Red.gtkrc
index 427ee936d..19dfbd184 100644
--- a/rtdata/themes/25-Gray-Red.gtkrc
+++ b/rtdata/themes/25-Gray-Red.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 	bg[ACTIVE]        = shade (0.80, @rt_bg_color)
 }
@@ -454,6 +463,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/37-Gray-Red-Textured.gtkrc b/rtdata/themes/37-Gray-Red-Textured.gtkrc
index 5f18b01f7..e23536d4f 100644
--- a/rtdata/themes/37-Gray-Red-Textured.gtkrc
+++ b/rtdata/themes/37-Gray-Red-Textured.gtkrc
@@ -155,6 +155,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = @rt_bg_color
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -558,6 +565,8 @@ style "clearlooks-range" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = @rt_bg_color
 	bg[ACTIVE]        = shade (0.85, @rt_bg_color)
 }
@@ -805,6 +814,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/37-Gray-Red.gtkrc b/rtdata/themes/37-Gray-Red.gtkrc
index 65a9f2ff1..75c700c75 100644
--- a/rtdata/themes/37-Gray-Red.gtkrc
+++ b/rtdata/themes/37-Gray-Red.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = @rt_bg_color
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = @rt_bg_color
 	bg[ACTIVE]        = shade (0.85, @rt_bg_color)
 }
@@ -455,6 +464,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/63-Gray-Cyan.gtkrc b/rtdata/themes/63-Gray-Cyan.gtkrc
index b45a21c8e..966d27923 100644
--- a/rtdata/themes/63-Gray-Cyan.gtkrc
+++ b/rtdata/themes/63-Gray-Cyan.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.05, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.05, @rt_bg_color)
 	bg[ACTIVE]        = shade (0.92, @rt_bg_color)
 }
@@ -455,6 +464,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/92-Beige-DarkCyan.gtkrc b/rtdata/themes/92-Beige-DarkCyan.gtkrc
index 195c8309c..72ae0e43d 100644
--- a/rtdata/themes/92-Beige-DarkCyan.gtkrc
+++ b/rtdata/themes/92-Beige-DarkCyan.gtkrc
@@ -153,6 +153,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -209,6 +216,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 }
 
@@ -442,6 +451,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtdata/themes/Default.gtkrc b/rtdata/themes/Default.gtkrc
index fc74d755b..ca06c4d9f 100644
--- a/rtdata/themes/Default.gtkrc
+++ b/rtdata/themes/Default.gtkrc
@@ -142,6 +142,13 @@ style "clearlooks-spinbutton" {
 	}
 }
 
+style "clearlooks-framelessspinbutton" {
+
+	# IMPORTANT!
+	# base[NORMAL] must have the same color than notebook bg[NORMAL]
+	base[NORMAL]       = shade (1.02, @rt_bg_color)
+}
+
 style "clearlooks-scale" {
 	xthickness = 2
 	ythickness = 2
@@ -190,6 +197,8 @@ style "clearlooks-vscrollbar" {
 
 style "clearlooks-notebook_bg" {
 
+	# IMPORTANT!
+	# If you modify bg[NORMAL] here under, you must set clearlooks-framelessspinbutton -> base[NORMAL] to the very same value
 	bg[NORMAL]        = shade (1.02, @rt_bg_color)
 }
 
@@ -395,6 +404,7 @@ widget_class "*.<GtkCList>.<GtkButton>" style "clearlooks-treeview_header"
 widget "*.partialPasteHeader.*" style "clearlooks-frame_title"
 widget "*.partialPasteHeaderSep" style "clearlooks-partialPasteHeaderSep"
 widget "*.histButton" style "clearlooks-histButton"
+widget "*.FramelessSpinButton" style "clearlooks-framelessspinbutton"
 
 # The window of the tooltip is called "gtk-tooltip"
 ##################################################################
diff --git a/rtgui/adjuster.cc b/rtgui/adjuster.cc
index 62126a5af..d585c1720 100644
--- a/rtgui/adjuster.cc
+++ b/rtgui/adjuster.cc
@@ -67,6 +67,8 @@ Adjuster::Adjuster (Glib::ustring vlabel, double vmin, double vmax, double vstep
   hbox->pack_end (*reset, Gtk::PACK_SHRINK, 0); 
   
   spin = Gtk::manage (new MySpinButton ());
+  spin->set_has_frame(false);
+  spin->set_name("FramelessSpinButton");
 
   hbox->pack_end (*spin, Gtk::PACK_SHRINK, 0);
 
@@ -132,6 +134,8 @@ Adjuster::Adjuster (Gtk::Image *imgIcon, double vmin, double vmax, double vstep,
   hbox->pack_end (*reset, Gtk::PACK_SHRINK, 0); 
   
   spin = Gtk::manage (new MySpinButton ());
+  spin->set_has_frame(false);
+  spin->set_name("FramelessSpinButton");
 
   reset->set_size_request (-1, spin->get_height());
   
@@ -208,18 +212,13 @@ void Adjuster::setLimits (double vmin, double vmax, double vstep, double vdefaul
   spin->set_digits (digits);
   spin->set_increments (vstep, 2.0*vstep);
   spin->set_range (vmin, vmax);
+  spin->updateSize();
   spin->set_value (shapeValue(vdefault));
   slider->set_digits (digits);
   slider->set_increments (vstep, 2.0*vstep);
   slider->set_range (vmin, vmax);
   slider->set_value (shapeValue(vdefault));
   //defaultVal = shapeValue (vdefault);
-
-  double maxAbs = fmax(fabs(vmin), fabs(vmax));
-  int digits2;
-  for (digits2=0; maxAbs/pow(double(10),digits2)>=1.0; digits2++);
-  spin->set_width_chars(digits+digits2+(vmin<0?1:0)+(digits>0?1:0));
-
   sliderChange.block (false);
   spinChange.block (false);
 }
diff --git a/rtgui/guiutils.cc b/rtgui/guiutils.cc
index 85812ba64..9dffd7d9d 100644
--- a/rtgui/guiutils.cc
+++ b/rtgui/guiutils.cc
@@ -309,13 +309,44 @@ MySpinButton::MySpinButton () {
 	Gtk::Border border;
 	border.bottom = 0;
 	border.top = 0;
-	border.left = 0;
-	border.right = 0;
+	border.left = 3;
+	border.right = 3;
 	set_inner_border(border);
+	set_numeric(true);
+	set_wrap(true);
+	set_alignment(Gtk::ALIGN_RIGHT);
+}
+
+void MySpinButton::updateSize() {
+	double vMin, vMax;
+	double step, page;
+	double maxAbs;
+	unsigned int digits, digits2;
+	unsigned int maxLen;
+
+	get_range(vMin, vMax);
+	get_increments (step, page);
+
+	maxAbs = fmax(fabs(vMin), fabs(vMax));
+	digits = get_digits();
+	for (digits2=0; maxAbs/pow(double(10),digits2)>=1.0; digits2++);
+	maxLen = digits+digits2+(vMin<0?1:0)+(digits>0?1:0);
+
+	set_max_length(maxLen);
+	set_width_chars(maxLen);
+}
+
+bool MySpinButton::on_key_press_event (GdkEventKey* event) {
+	bool rcode = Gtk::Widget::on_key_press_event(event);
+	if ( (event->string[0] >= 'a' && event->string[0] <= 'z')
+	   ||(event->string[0] >= 'A' && event->string[0] <= 'Z')
+	   || event->string[0] == '+'
+	)
+		return false;
+	return rcode;
 }
 
 bool MySpinButton::on_scroll_event (GdkEventScroll* event) {
-
 	// If Shift is pressed, the widget is modified
 	if (event->state & GDK_SHIFT_MASK) {
 		Gtk::SpinButton::on_scroll_event(event);
diff --git a/rtgui/guiutils.h b/rtgui/guiutils.h
index e150ca127..9256d5c09 100644
--- a/rtgui/guiutils.h
+++ b/rtgui/guiutils.h
@@ -109,10 +109,13 @@ public:
  */
 class MySpinButton : public Gtk::SpinButton {
 
+protected:
 	bool on_scroll_event (GdkEventScroll* event);
+	bool on_key_press_event (GdkEventKey* event);
 
 public:
 	MySpinButton ();
+	void updateSize();
 };
 
 /**