diff --git a/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate b/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate
index 164dea0..6f26b18 100644
Binary files a/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate and b/Builds/MacOSX/Dexed.xcodeproj/project.xcworkspace/xcuserdata/asb2m10.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/README.md b/README.md
index 429a8b6..64af96c 100644
--- a/README.md
+++ b/README.md
@@ -18,11 +18,12 @@ in the source folder) stays on the Apache 2.0 license to able to collaborate bet
 Changelog
 ---------
 
-#### Version 0.8.1
+#### Version 0.8.2
 * Cartridge Manager
 * Apple AU support
 * Basic theming
 * Fixed the UI corruption when more than one Dexed instance was loaded
+* Fixed wrong display value issues
 
 #### Version 0.8.0
 * New UI by [AZur Studio](http://bji.yukihotaru.com/)
diff --git a/Source/CartManager.cpp b/Source/CartManager.cpp
index c43238c..fe58aa9 100644
--- a/Source/CartManager.cpp
+++ b/Source/CartManager.cpp
@@ -211,6 +211,9 @@ void CartManager::resetActiveSysex() {
 
 void CartManager::selectionChanged() {
     File file = cartBrowser->getSelectedFile();
+
+    if ( ! file.exists() )
+        return;
     
     if ( file.isDirectory() )
         return;
@@ -233,6 +236,9 @@ void CartManager::selectionChanged() {
         message << ((int)checksum) << " != " << ((int)syx_data[4102]);
         
         AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon, "Warning", message);
+        browserCart->readOnly = true;
+    } else {
+        browserCart->readOnly = false;
     }
     browserCart->setSelected(-1);
     browserCart->setCartridge(browserSysex);
@@ -270,6 +276,38 @@ void CartManager::programRightClicked(ProgramListBox *source, int pos) {
 
 }
 
+void CartManager::programDragged(ProgramListBox *destListBox, int dest, char *packedPgm) {
+    if ( destListBox == activeCart ) {
+        char *sysex = mainWindow->processor->sysex;
+        memcpy(sysex+(dest*128), packedPgm, 128);
+        mainWindow->updateUI();
+    } else {
+        File file = cartBrowser->getSelectedFile();
+        
+        if ( ! file.exists() )
+            return;
+        
+        if ( file.isDirectory() )
+            return;
+        if ( file.getSize() > 5000 )
+            return;
+        
+        MemoryBlock block;
+        file.loadFileAsData(block);
+        
+        if ( block.getSize() < 4104 )
+            return;
+        
+        char *sysex = ((char *) block.getData()) + 6;
+        memcpy(sysex+(dest*128), packedPgm, 128);
+        
+        char exported[4104];
+        exportSysexCart(exported, sysex, 0);
+        file.replaceWithData(exported, 4104);
+        browserCart->setCartridge(sysex);
+    }
+}
+
 void CartManager::initialFocus() {
     cartBrowser->grabKeyboardFocus();
 }
diff --git a/Source/CartManager.h b/Source/CartManager.h
index 0bd7a3c..681a452 100644
--- a/Source/CartManager.h
+++ b/Source/CartManager.h
@@ -65,6 +65,7 @@ public:
         
     virtual void programSelected(ProgramListBox *source, int pos) override;
     virtual void programRightClicked(ProgramListBox *source, int pos) override;
+    virtual void programDragged(ProgramListBox *destListBox, int dest, char *packedPgm) override;
         
     void initialFocus();
 };
diff --git a/Source/Dexed.h b/Source/Dexed.h
index a76a1ea..695c75a 100644
--- a/Source/Dexed.h
+++ b/Source/Dexed.h
@@ -24,14 +24,14 @@
 void dexed_trace(const char *source, const char *fmt, ...);
 
 #ifdef DEBUG
-    #define DEXED_VERSION "0.8.1 DEBUG"
+    #define DEXED_VERSION "0.8.2 DEBUG"
     #ifdef _MSC_VER
         #define TRACE(fmt, ...) dexed_trace(__FUNCTION__,fmt,##__VA_ARGS__)
     #else
         #define TRACE(fmt, ...) dexed_trace(__PRETTY_FUNCTION__,fmt,##__VA_ARGS__)
     #endif
 #else
-    #define DEXED_VERSION "0.8.1"
+    #define DEXED_VERSION "0.8.2"
     #define TRACE(fmt, ...)
 #endif
 
diff --git a/Source/OperatorEditor.cpp b/Source/OperatorEditor.cpp
index 94c4dcb..f9a03ec 100644
--- a/Source/OperatorEditor.cpp
+++ b/Source/OperatorEditor.cpp
@@ -458,7 +458,7 @@ void OperatorEditor::updateDisplay() {
     if (opMode->getToggleState() == 0) {
         if ( freq == 0 )
             freq = 0.5;
-        txtFreq << "f = " << (freq + ((freq*2) * (fine/100)));
+        txtFreq << "f = " << (freq + (freq * (fine/100)));
     } else {
         freq = pow(10,((int)freq)&3);
         freq = freq + ((freq*10) * (fine/100));
diff --git a/Source/ProgramListBox.cpp b/Source/ProgramListBox.cpp
index e0b7e5c..6309421 100644
--- a/Source/ProgramListBox.cpp
+++ b/Source/ProgramListBox.cpp
@@ -28,6 +28,8 @@ ProgramListBox::ProgramListBox(const String name, int numCols) : Component(name)
     rows = 32 / numCols;
     selectedPgm = -1;
     hasContent = false;
+    dragCandidate = -1;
+    readOnly = false;
 }
 
 void ProgramListBox::paint(Graphics &g) {
@@ -44,7 +46,6 @@ void ProgramListBox::paint(Graphics &g) {
     g.setColour(Colour(75,73,73));
     g.drawLine(0,getHeight(),getWidth(),getHeight(), 2);
 
-
     const float dashLength[] = { 4, 4 };
 
     g.setColour(Colour(83,76,69));
@@ -59,14 +60,20 @@ void ProgramListBox::paint(Graphics &g) {
     
     for(int i=0;i<cols;i++) {
         for(int j=0;j<rows;j++) {
-            if ( selectedPgm == pgm ) {
+            if ( selectedPgm == pgm && dragCandidate == -1 ) {
                 g.setColour(DXLookNFeel::fillColour);
                 g.fillRoundedRectangle(cellWidth*i+2, cellHeight*j + 2, cellWidth - 4, cellHeight - 4, 0);
             }
 
             if ( hasContent == true ) {
-                g.setColour(Colours::white);
-                g.drawFittedText(programNames[pgm], cellWidth * i , cellHeight * j, cellWidth, cellHeight, Justification::centred, true);
+                if ( dragCandidate != pgm ) {
+                    g.setColour(Colours::white);
+                    g.drawFittedText(programNames[pgm], cellWidth * i , cellHeight * j, cellWidth, cellHeight, Justification::centred, true);
+                } else {
+                    g.setColour(DXLookNFeel::fillColour);
+                    g.fillRoundedRectangle(cellWidth*i+2, cellHeight*j + 2, cellWidth - 4, cellHeight - 4, 0);
+                }
+                
             }
             pgm++;
         }
@@ -89,8 +96,8 @@ void ProgramListBox::addListener(ProgramListBoxListener *listener) {
     this->listener = listener;
 }
 
-int ProgramListBox::programPosition(const MouseEvent &event) {
-    return (event.getMouseDownY() / cellHeight) + ((event.getMouseDownX() / cellWidth) * rows);
+int ProgramListBox::programPosition(int x, int y) {
+    return (y / cellHeight) + ((x / cellWidth) * rows);
 }
 
 void ProgramListBox::mouseDoubleClick(const MouseEvent &event) {
@@ -99,7 +106,7 @@ void ProgramListBox::mouseDoubleClick(const MouseEvent &event) {
     if ( ! event.mods.isLeftButtonDown() )
         return;
     
-    int pos = programPosition(event);
+    int pos = programPosition(event.getMouseDownX(), event.getMouseDownY());
     if ( listener != nullptr )
         listener->programSelected(this, pos);
 }
@@ -110,11 +117,33 @@ void ProgramListBox::mouseDown(const MouseEvent &event) {
     if ( ! event.mods.isRightButtonDown() )
         return;
     
-    int pos = programPosition(event);
+    int pos = programPosition(event.getMouseDownX(), event.getMouseDownY());
     if ( listener != nullptr )
         listener->programRightClicked(this, pos);
 }
 
+void ProgramListBox::mouseDrag(const MouseEvent &event) {
+    if ( ! hasContent )
+        return;
+    if ( dragCandidate != -1 )
+        return;
+    if ( event.getDistanceFromDragStart() < 7 )
+        return;
+    
+    if (DragAndDropContainer* const dragContainer = DragAndDropContainer::findParentDragContainerFor(this)) {
+        Image snapshot (Image::ARGB, cellWidth, cellHeight, true);
+        int position = programPosition(event.getMouseDownX(), event.getMouseDownY());
+        Graphics g(snapshot);
+        g.setColour(DXLookNFeel::lightBackground);
+        g.fillRect(0,0,cellWidth, cellHeight);
+        g.setColour(Colours::white);
+        g.drawFittedText(programNames[position], 0, 0, cellWidth, cellHeight, Justification::centred, true);
+        void *src = cartContent + (position*128);
+        var description = var(src, 128);
+        dragContainer->startDragging(description, this, snapshot, false);
+    }
+}
+
 void ProgramListBox::setSelected(int idx) {
     selectedPgm = idx;
 }
@@ -124,3 +153,44 @@ char* ProgramListBox::getCurrentCart() {
         return nullptr;
     return cartContent;
 }
+
+bool ProgramListBox::isInterestedInDragSource (const SourceDetails& dragSourceDetail)  {
+    if ( readOnly )
+        return false;
+    if ( ! hasContent )
+        return false;
+    
+    Component *comp = dragSourceDetail.sourceComponent.get();
+    if ( comp == nullptr )
+        return false;
+    if ( dynamic_cast<ProgramListBox*>(comp) == nullptr )
+        return false;
+    
+    return true;
+}
+
+void ProgramListBox::itemDropped(const SourceDetails& dragSourceDetails) {
+    dragCandidate = programPosition(dragSourceDetails.localPosition.x, dragSourceDetails.localPosition.y);
+    
+    MemoryBlock* block = dragSourceDetails.description.getBinaryData();
+    if ( listener != nullptr )
+        listener->programDragged(this, dragCandidate, (char *)block->getData());
+    dragCandidate = -1;
+    repaint();
+}
+
+void ProgramListBox::itemDragEnter(const SourceDetails &dragSourceDetails) {
+    dragCandidate = programPosition(dragSourceDetails.localPosition.x, dragSourceDetails.localPosition.y);
+    repaint();
+}
+
+void ProgramListBox::itemDragMove(const SourceDetails &dragSourceDetails) {
+    dragCandidate = programPosition(dragSourceDetails.localPosition.x, dragSourceDetails.localPosition.y);
+    repaint();
+}
+
+void ProgramListBox::itemDragExit(const SourceDetails &dragSourceDetails) {
+    dragCandidate = -1;
+    repaint();
+}
+
diff --git a/Source/ProgramListBox.h b/Source/ProgramListBox.h
index a8c862a..531971a 100644
--- a/Source/ProgramListBox.h
+++ b/Source/ProgramListBox.h
@@ -29,23 +29,27 @@ public:
     virtual ~ProgramListBoxListener() {}
     virtual void programSelected(ProgramListBox *source, int pos) = 0;
     virtual void programRightClicked(ProgramListBox *source, int pos) = 0;
+    virtual void programDragged(ProgramListBox *destListBox, int dest, char *packedPgm) = 0;
 };
 
-class ProgramListBox : public Component {
+class ProgramListBox : public Component, public DragAndDropTarget {
     ProgramListBoxListener *listener;
     bool hasContent;
     bool showPgmNumber;
     int cols, rows;
     int cellWidth, cellHeight;
-    int programPosition(const MouseEvent &event);
+    int programPosition(int x, int y);
     int selectedPgm;
     
     // TODO: this should be a pointer
     char cartContent[4104];
-    
+
+    int dragCandidate;
 public:
     StringArray programNames;    
     
+    bool readOnly;
+    
     ProgramListBox(const String name, int numCols);
     void addListener(ProgramListBoxListener *listener);
     void paint(Graphics &g);
@@ -53,8 +57,15 @@ public:
     void resized();
     void mouseDoubleClick(const MouseEvent &event);
     void mouseDown(const MouseEvent &event);
+    void mouseDrag(const MouseEvent &event);
     void setSelected(int idx);
     char* getCurrentCart();
+    
+    bool isInterestedInDragSource(const SourceDetails& dragSourceDetails) override;
+    void itemDragEnter(const SourceDetails &dragSourceDetails) override;
+    void itemDragMove(const SourceDetails &dragSourceDetails) override;
+    void itemDragExit(const SourceDetails &dragSourceDetails) override;
+    void itemDropped(const SourceDetails& dragSourceDetails) override;
 };