diff --git a/src/data/statistics.cpp b/src/data/statistics.cpp
index 742ff26f..0e0a3b21 100644
--- a/src/data/statistics.cpp
+++ b/src/data/statistics.cpp
@@ -13,6 +13,7 @@
 
 StatsDimension::StatsDimension()
 	: automatic(false)
+	, numeric(false)
 {}
 
 StatsDimension::StatsDimension(const Field& field)
@@ -20,6 +21,7 @@ StatsDimension::StatsDimension(const Field& field)
 	, name         (field.name)
 	, description  (field.description)
 	, icon_filename(field.icon_filename)
+	, numeric(false)
 {
 	// initialize script, card.{field_name}
 	Script& s = script.getScript();
@@ -34,6 +36,7 @@ IMPLEMENT_REFLECTION(StatsDimension) {
 		REFLECT(description);
 		REFLECT_N("icon", icon_filename);
 		REFLECT(script);
+		REFLECT(numeric);
 	}
 }
 
diff --git a/src/data/statistics.hpp b/src/data/statistics.hpp
index 9907c76f..c986ab22 100644
--- a/src/data/statistics.hpp
+++ b/src/data/statistics.hpp
@@ -30,6 +30,7 @@ class StatsDimension {
 	String         description;		///< Description, used in status bar
 	String         icon_filename;	///< Icon for lists
 	OptionalScript script;			///< Script that determines the value(s)
+	bool           numeric;			///< Are the values numeric? If so, they require special sorting
 	bool           automatic;		///< Based on a card field?
 	
 	DECLARE_REFLECTION();
diff --git a/src/gfx/gfx.hpp b/src/gfx/gfx.hpp
index cf355697..b0971cca 100644
--- a/src/gfx/gfx.hpp
+++ b/src/gfx/gfx.hpp
@@ -68,9 +68,6 @@ void linear_blend(Image& img1, const Image& img2, double x1,double y1, double x2
  */
 void mask_blend(Image& img1, const Image& img2, const Image& mask);
 
-/// Use the red channel of img_alpha as alpha channel for img
-void set_alpha(Image& img, const Image& img_alpha);
-
 // ----------------------------------------------------------------------------- : Effects
 
 /// Saturate an image, amount should be in range [0...100]
@@ -116,16 +113,27 @@ void draw_combine_image(DC& dc, UInt x, UInt y, const Image& img, ImageCombine c
 
 // ----------------------------------------------------------------------------- : Masks
 
+/// Use the red channel of img_alpha as alpha channel for img
+void set_alpha(Image& img, const Image& img_alpha);
+
 /// An alpha mask is an alpha channel that can be copied to another image
 /** It is created by treating black in the source image as transparent and white (red) as opaque
  */
 class AlphaMask {
   public:
-	AlphaMask();
+	AlphaMask(const Image& mask);
 	~AlphaMask();
 	
-	// TODO
+	/// Apply the alpha mask to an image
+	void setAlpha(Image& i) const;
+	/// Apply the alpha mask to a bitmap
+	void setAlpha(Bitmap& b) const;
 	
+	/// Is the given location fully transparent?
+	bool isTransparent(int x, int y) const;
+	
+	/// Size of the mask
+	wxSize size;
   private:
 	Byte* alpha;
 };
diff --git a/src/gui/control/card_editor.cpp b/src/gui/control/card_editor.cpp
index 3d1b7b94..8cf9760e 100644
--- a/src/gui/control/card_editor.cpp
+++ b/src/gui/control/card_editor.cpp
@@ -126,6 +126,8 @@ void DataEditor::createTabIndex() {
 }
 void DataEditor::onInit() {
 	createTabIndex();
+	current_viewer = nullptr;
+	current_editor = nullptr;
 }
 
 // ----------------------------------------------------------------------------- : Clipboard & Formatting
diff --git a/src/gui/control/graph.cpp b/src/gui/control/graph.cpp
index 243a15fd..7733176a 100644
--- a/src/gui/control/graph.cpp
+++ b/src/gui/control/graph.cpp
@@ -42,9 +42,36 @@ GraphData::GraphData(const GraphDataPre& d)
 			counts[e->values[i]] += 1;
 		}
 		// TODO: allow some ordering in the groups, and allow colors to be passed
-		FOR_EACH(c, counts) {
-			a->groups.push_back(GraphGroup(c.first, c.second));
-			a->max = max(a->max, c.second);
+		if (a->numeric) {
+			// TODO: start at something other than 0?
+			// TODO: support fractions?
+			size_t left = counts.size();
+			int i = 0;
+			while (left) {
+				String is = String() << i++;
+				map<String,UInt>::const_iterator it = counts.find(is);
+				if (it == counts.end()) {
+					// not found, add a 0 bar
+					a->groups.push_back(GraphGroup(is, 0));
+				} else {
+					a->groups.push_back(GraphGroup(is, it->second));
+					a->max = max(a->max, it->second);
+					left--;
+				}
+				if (i > 100) {
+					// prevent infinite loops if there are non-numeric entries
+					// drop empty tail
+					while (a->groups.size() > 1 && a->groups.back().size == 0) {
+						a->groups.pop_back();
+					}
+					break;
+				}
+			}
+		} else {
+			FOR_EACH(c, counts) {
+				a->groups.push_back(GraphGroup(c.first, c.second));
+				a->max = max(a->max, c.second);
+			}
 		}
 		// find some nice colors for the groups
 		if (a->auto_color) {
@@ -106,7 +133,7 @@ bool Graph1D::findItem(const RealPoint& pos, const RealRect& rect, vector<int>&
 void BarGraph::draw(RotatedDC& dc, int current) const {
 	if (!data) return;
 	// Rectangle for bars
-	RealRect rect = dc.getInternalRect().move(15, 5, -20, -20);
+	RealRect rect = dc.getInternalRect().move(23, 8, -30, -28);
 	// Bar sizes
 	GraphAxis& axis = axis_data();
 	int count = int(axis.groups.size());
@@ -151,10 +178,10 @@ void BarGraph::draw(RotatedDC& dc, int current) const {
 	FOR_EACH_CONST(g, axis.groups) {
 		// draw bar
 		dc.SetBrush(g.color);
-		dc.DrawRectangle(RealRect(x + space / 2, rect.bottom() + 1, width, -step_height * g.size - 1.999));
+		dc.DrawRectangle(RealRect(x + space / 2, rect.bottom() + 1, width, (int)(rect.bottom() - step_height * g.size) - rect.bottom() - 1));
 		// draw label, aligned bottom center
 		RealSize text_size = dc.GetTextExtent(g.name);
-		dc.SetClippingRegion(RealRect(x + 2, rect.bottom(), width_space - 4, text_size.height));
+		dc.SetClippingRegion(RealRect(x + 2, rect.bottom() + 3, width_space - 4, text_size.height));
 		dc.DrawText(g.name, align_in_rect(ALIGN_TOP_CENTER, text_size, RealRect(x, rect.bottom() + 3, width_space, 0)));
 		dc.DestroyClippingRegion();
 		x += width_space;
@@ -163,7 +190,7 @@ void BarGraph::draw(RotatedDC& dc, int current) const {
 int BarGraph::findItem(const RealPoint& pos, const RealRect& rect1) const {
 	if (!data) return -1;
 	// Rectangle for bars
-	RealRect rect = rect1.move(15, 5, -20, -20);
+	RealRect rect = rect1.move(23, 8, -30, -28);
 	// Bar sizes
 	GraphAxis& axis = axis_data();
 	int count = int(axis.groups.size());
diff --git a/src/gui/control/graph.hpp b/src/gui/control/graph.hpp
index f2a46067..30546fc5 100644
--- a/src/gui/control/graph.hpp
+++ b/src/gui/control/graph.hpp
@@ -36,15 +36,17 @@ class GraphGroup {
 /** The sum of groups.sum = sum of all elements in the data */
 class GraphAxis {
   public:
-	GraphAxis(const String& name, bool auto_color = true)
+	GraphAxis(const String& name, bool auto_color = true, bool numeric = false)
 		: name(name)
 		, auto_color(auto_color)
 		, max(0)
+		, numeric(numeric)
 	{}
 	
 	String             name;		///< Name/label of this axis
 	bool               auto_color;	///< Automatically assign colors to the groups on this axis
 	vector<GraphGroup> groups;		///< Groups along this axis
+	bool               numeric;		///< Numeric axis?
 	UInt               max;			///< Maximum size of the groups
 };
 
diff --git a/src/gui/control/package_list.cpp b/src/gui/control/package_list.cpp
index 8d99781a..204c5407 100644
--- a/src/gui/control/package_list.cpp
+++ b/src/gui/control/package_list.cpp
@@ -54,9 +54,10 @@ void PackageList::showData(const String& pattern) {
 			PackageP package = ::packages.openAny(f);
 			// open image
 			InputStreamP stream = package->openIconFile();
+			Image img;
 			Bitmap bmp;
-			if (stream) {
-				bmp = Bitmap(Image(*stream));
+			if (stream && img.LoadFile(*stream)) {
+				bmp = Bitmap(img);
 			}
 			// add to list
 			packages.push_back(PackageData(package, bmp));
diff --git a/src/gui/set/stats_panel.cpp b/src/gui/set/stats_panel.cpp
index 5ac419b3..df67509b 100644
--- a/src/gui/set/stats_panel.cpp
+++ b/src/gui/set/stats_panel.cpp
@@ -114,7 +114,7 @@ void StatsPanel::onCommand(int id) {
 				StatsCategory& cat = categories->getSelection();
 				GraphDataPre d;
 				FOR_EACH(dim, cat.dimensions) {
-					d.axes.push_back(new_shared1<GraphAxis>(dim->name));
+					d.axes.push_back(new_shared3<GraphAxis>(dim->name, true, dim->numeric));
 				}
 				FOR_EACH(card, set->cards) {
 					Context& ctx = set->getContext(card);
diff --git a/src/mse.vcproj b/src/mse.vcproj
index 86ebc8cf..2543b538 100644
--- a/src/mse.vcproj
+++ b/src/mse.vcproj
@@ -1978,6 +1978,9 @@
 			<File
 				RelativePath=".\gfx\image_effects.cpp">
 			</File>
+			<File
+				RelativePath=".\gfx\mask_image.cpp">
+			</File>
 			<File
 				RelativePath=".\gfx\polynomial.cpp">
 			</File>
diff --git a/src/render/value/image.cpp b/src/render/value/image.cpp
index 5938e820..6341f586 100644
--- a/src/render/value/image.cpp
+++ b/src/render/value/image.cpp
@@ -9,6 +9,7 @@
 #include <render/value/image.hpp>
 #include <render/card/viewer.hpp>
 #include <data/set.hpp>
+#include <data/stylesheet.hpp>
 #include <gui/util.hpp>
 
 // ----------------------------------------------------------------------------- : ImageValueViewer
@@ -23,9 +24,9 @@ void ImageValueViewer::draw(RotatedDC& dc) {
 			if (image.LoadFile(*image_file)) {
 				image.Rescale(dc.trS(style().width), dc.trS(style().height));
 				// apply mask to image
-/*				loadMask(dc);
+				loadMask(dc);
 				if (alpha_mask) alpha_mask->setAlpha(image);
-*/				bitmap = Bitmap(image);
+				bitmap = Bitmap(image);
 			}
 		} catch (Error e) {
 			handle_error(e, false, false); // don't handle now, we are in onPaint
@@ -34,15 +35,9 @@ void ImageValueViewer::draw(RotatedDC& dc) {
 	// if there is no image, generate a placeholder, only if there is enough room for it
 	if (!bitmap.Ok() && style().width > 40) {
 		bitmap = imagePlaceholder(dc, dc.trS(style().width), dc.trS(style().height), viewer.drawEditing());
-/*		loadMask(dc);
+		loadMask(dc);
 		if (alpha_mask) alpha_mask->setAlpha(bitmap);
-/*		if (alphaMask) {
-			// convert to image and apply alpha
-			Image image = bmp.ConvertToImage();
-			alpha_mask->setAlpha(image);
-			bitmap = image;
-		}
-*/	}
+	}
 	// draw image, if any
 	if (bitmap.Ok()) {
 		dc.DrawBitmap(bitmap, style().getPos());
@@ -55,15 +50,13 @@ bool ImageValueViewer::containsPoint(const RealPoint& p) const {
 	if (x < 0 || y < 0 || x >= (int)style().width || y >= (int)style().height) {
 		return false; // outside rectangle
 	}
-/*	// check against mask
-	if (!style->maskFilename.value.empty()) {
-		RotatedObject rot(viewer.getRotation());
-		loadMask(rot);
-		return !alphaMask->isTransparent(x, y);
+	// check against mask
+	if (!style().mask_filename().empty()) {
+		loadMask(viewer.getRotation());
+		return !alpha_mask || !alpha_mask->isTransparent(x, y);
 	} else {
 		return true;
-	}*/
-	return true;
+	}
 }
 
 void ImageValueViewer::onValueChange() {
@@ -72,7 +65,20 @@ void ImageValueViewer::onValueChange() {
 
 void ImageValueViewer::onStyleChange() {
 	bitmap = Bitmap();
-//	alpha_mask = AlphaMaskP();
+	alpha_mask = AlphaMaskP();
+}
+
+void ImageValueViewer::loadMask(const Rotation& rot) const {
+	if (style().mask_filename().empty()) return; // no mask
+	if (alpha_mask && alpha_mask->size == wxSize(rot.trS(style().width), rot.trS(style().height))) return; // mask loaded and right size
+	// (re) load the mask
+	Image image;
+	InputStreamP image_file = viewer.stylesheet->openIn(style().mask_filename);
+	if (image.LoadFile(*image_file)) {
+		Image resampled(rot.trS(style().width), rot.trS(style().height));
+		resample(image, resampled);
+		alpha_mask = new_shared1<AlphaMask>(resampled);
+	}
 }
 
 Bitmap ImageValueViewer::imagePlaceholder(const Rotation& rot, UInt w, UInt h, bool editing) {
diff --git a/src/render/value/image.hpp b/src/render/value/image.hpp
index 32893532..7426c27c 100644
--- a/src/render/value/image.hpp
+++ b/src/render/value/image.hpp
@@ -13,6 +13,8 @@
 #include <render/value/viewer.hpp>
 #include <data/field/image.hpp>
 
+DECLARE_POINTER_TYPE(AlphaMask);
+
 // ----------------------------------------------------------------------------- : ImageValueViewer
 
 /// Viewer that displays an image value
@@ -29,9 +31,9 @@ class ImageValueViewer : public ValueViewer {
 			
   private:
 	Bitmap bitmap;
-//	mutable AlphaMaskP alpha_mask;
+	mutable AlphaMaskP alpha_mask;
 	
-//	void loadMask(const RotatedObject& rot) const;
+	void loadMask(const Rotation& rot) const;
 	
 	/// Generate a placeholder image
 	static Bitmap imagePlaceholder(const Rotation& rot, UInt w, UInt h, bool editing);
diff --git a/src/util/rotation.hpp b/src/util/rotation.hpp
index 7c4e29f1..b89d3843 100644
--- a/src/util/rotation.hpp
+++ b/src/util/rotation.hpp
@@ -42,7 +42,7 @@ class Rotation {
 	RealRect getExternalRect() const;
 	
 	/// Translate a size or length
-	inline double trS(double s) const { return  s * zoom; }
+	inline double trS(double s) const { return s * zoom; }
 	
 	/// Translate a single point
 	RealPoint tr(const RealPoint& p) const;