diff --git a/CodenameOne/src/com/codename1/charts/models/XYSeries.java b/CodenameOne/src/com/codename1/charts/models/XYSeries.java
index 0b95a42cd4..b3be28a917 100644
--- a/CodenameOne/src/com/codename1/charts/models/XYSeries.java
+++ b/CodenameOne/src/com/codename1/charts/models/XYSeries.java
@@ -148,7 +148,7 @@ public void setTitle(String title) {
      * @param x the value for the X axis
      * @param y the value for the Y axis
      */
-    public synchronized void add(double x, double y) {
+    public void add(double x, double y) {
         while (mXY.get(x) != null) {
             // add a very small value to x such as data points sharing the same x will
             // still be added
@@ -165,7 +165,7 @@ public synchronized void add(double x, double y) {
      * @param x the value for the X axis
      * @param y the value for the Y axis
      */
-    public synchronized void add(int index, double x, double y) {
+    public void add(int index, double x, double y) {
         while (mXY.get(x) != null) {
             // add a very small value to x such as data points sharing the same x will
             // still be added
@@ -184,7 +184,7 @@ protected double getPadding(double x) {
      *
      * @param index the index in the series of the value to remove
      */
-    public synchronized void remove(int index) {
+    public void remove(int index) {
         XYEntry<Double, Double> removedEntry = mXY.removeByIndex(index);
         double removedX = removedEntry.getKey();
         double removedY = removedEntry.getValue();
@@ -196,7 +196,7 @@ public synchronized void remove(int index) {
     /**
      * Removes all the existing values and annotations from the series.
      */
-    public synchronized void clear() {
+    public void clear() {
         clearAnnotations();
         clearSeriesValues();
     }
@@ -204,7 +204,7 @@ public synchronized void clear() {
     /**
      * Removes all the existing values from the series but annotations.
      */
-    public synchronized void clearSeriesValues() {
+    public void clearSeriesValues() {
         mXY.clear();
         initRange();
     }
@@ -212,17 +212,17 @@ public synchronized void clearSeriesValues() {
     /**
      * Removes all the existing annotations from the series.
      */
-    public synchronized void clearAnnotations() {
-        mStringXY.clear();
-        mAnnotations.clear();
-    }
+    public void clearAnnotations() {
+        mStringXY.clear();
+        mAnnotations.clear();
+    }
 
     /**
      * Returns the current values that are used for drawing the series.
      *
      * @return the XY map
      */
-    public synchronized IndexXYMap<Double, Double> getXYMap() {
+    public IndexXYMap<Double, Double> getXYMap() {
         return mXY;
     }
 
@@ -232,7 +232,7 @@ public synchronized IndexXYMap<Double, Double> getXYMap() {
      * @param index the index
      * @return the X value
      */
-    public synchronized double getX(int index) {
+    public double getX(int index) {
         return mXY.getXByIndex(index);
     }
 
@@ -242,7 +242,7 @@ public synchronized double getX(int index) {
      * @param index the index
      * @return the Y value
      */
-    public synchronized double getY(int index) {
+    public double getY(int index) {
         return mXY.getYByIndex(index);
     }
 
@@ -335,7 +335,7 @@ public String getAnnotationAt(int index) {
      *          visible ones must be displayed
      * @return a submap of x and y values
      */
-    public synchronized SortedMap<Double, Double> getRange(double start, double stop,
+    public SortedMap<Double, Double> getRange(double start, double stop,
                                                            boolean beforeAfterPoints) {
         if (beforeAfterPoints) {
             // we need to add one point before the start and one point after the end
@@ -379,7 +379,7 @@ public int getIndexForKey(double key) {
      *
      * @return the series item count
      */
-    public synchronized int getItemCount() {
+    public int getItemCount() {
         return mXY.size();
     }
 
diff --git a/CodenameOne/src/com/codename1/charts/models/XYValueSeries.java b/CodenameOne/src/com/codename1/charts/models/XYValueSeries.java
index 81243cdc00..70f8d2e857 100644
--- a/CodenameOne/src/com/codename1/charts/models/XYValueSeries.java
+++ b/CodenameOne/src/com/codename1/charts/models/XYValueSeries.java
@@ -48,7 +48,7 @@ public XYValueSeries(String title) {
      * @param y the value for the Y axis
      * @param value the value
      */
-    public synchronized void add(double x, double y, double value) {
+    public void add(double x, double y, double value) {
         super.add(x, y);
         mValue.add(value);
         updateRange(value);
@@ -82,7 +82,7 @@ private void updateRange(double value) {
      * @param x the value for the X axis
      * @param y the value for the Y axis
      */
-    public synchronized void add(double x, double y) {
+    public void add(double x, double y) {
         add(x, y, 0d);
     }
 
@@ -91,7 +91,7 @@ public synchronized void add(double x, double y) {
      *
      * @param index the index in the series of the value to remove
      */
-    public synchronized void remove(int index) {
+    public void remove(int index) {
         super.remove(index);
         double removedValue = mValue.remove(index);
         if (removedValue == mMinValue || removedValue == mMaxValue) {
@@ -102,7 +102,7 @@ public synchronized void remove(int index) {
     /**
      * Removes all the values from the series.
      */
-    public synchronized void clear() {
+    public  void clear() {
         super.clear();
         mValue.clear();
         initRange();
@@ -114,7 +114,7 @@ public synchronized void clear() {
      * @param index the index
      * @return the value
      */
-    public synchronized double getValue(int index) {
+    public double getValue(int index) {
         return mValue.get(index);
     }
 
diff --git a/CodenameOne/src/com/codename1/io/BufferedInputStream.java b/CodenameOne/src/com/codename1/io/BufferedInputStream.java
index 6f7c945d88..2214292292 100644
--- a/CodenameOne/src/com/codename1/io/BufferedInputStream.java
+++ b/CodenameOne/src/com/codename1/io/BufferedInputStream.java
@@ -34,7 +34,7 @@
  */
 public class BufferedInputStream extends InputStream {
     private static int streamCount = 0;
-    private static int defaultBufferSize = 8192;
+    private static volatile int defaultBufferSize = 8192;
     private int actualAvailable = defaultBufferSize;
     private Object connection;
     private InputStream in;
@@ -212,10 +212,10 @@ public String getName() {
     }
 
     /**
-     * Check to make sure that underlying input stream has not been
+     * Check to make sure that the underlying input stream has not been
      * nulled out due to close; if not return it;
      */
-    private InputStream getInIfOpen() throws IOException {
+    private synchronized InputStream getInIfOpen() throws IOException {
         InputStream input = in;
         if (input == null) {
             throw new IOException("Stream closed");
@@ -227,7 +227,7 @@ private InputStream getInIfOpen() throws IOException {
      * Check to make sure that buffer has not been nulled out due to
      * close; if not return it;
      */
-    private byte[] getBufIfOpen() throws IOException {
+    private synchronized byte[] getBufIfOpen() throws IOException {
         byte[] buffer = buf;
         if (buffer == null) {
             throw new IOException("Stream closed");
@@ -377,7 +377,7 @@ private int read1(byte[] b, int off, int len) throws IOException {
         return cnt;
     }
 
-    private void yieldTime() {
+    private synchronized void yieldTime() {
         long time = System.currentTimeMillis();
         if (time - elapsedSinceLastYield > 300) {
             try {
@@ -656,16 +656,16 @@ public void close() throws IOException {
      *
      * @return time of the last activity on this stream
      */
-    public long getLastActivityTime() {
+    public synchronized long getLastActivityTime() {
         return lastActivityTime;
     }
 
     /**
-     * Returns the total amount of bytes read from this stream so far
+     * Returns the total number of bytes read from this stream so far
      *
-     * @return the total amount of bytes read from this stream so far
+     * @return the total number of bytes read from this stream so far
      */
-    public int getTotalBytesRead() {
+    public synchronized int getTotalBytesRead() {
         return totalBytesRead;
     }
 
@@ -706,14 +706,14 @@ public void setConnection(Object connection) {
     /**
      * @return the disableBuffering
      */
-    public boolean isDisableBuffering() {
+    public synchronized boolean isDisableBuffering() {
         return disableBuffering;
     }
 
     /**
      * @param disableBuffering the disableBuffering to set
      */
-    public void setDisableBuffering(boolean disableBuffering) {
+    public synchronized void setDisableBuffering(boolean disableBuffering) {
         this.disableBuffering = disableBuffering;
     }
 
@@ -723,7 +723,7 @@ public void setDisableBuffering(boolean disableBuffering) {
      *
      * @return the printInput
      */
-    public boolean isPrintInput() {
+    public synchronized boolean isPrintInput() {
         return printInput;
     }
 
@@ -733,7 +733,7 @@ public boolean isPrintInput() {
      *
      * @param printInput the printInput to set
      */
-    public void setPrintInput(boolean printInput) {
+    public synchronized void setPrintInput(boolean printInput) {
         this.printInput = printInput;
     }
 
@@ -743,7 +743,7 @@ public void setPrintInput(boolean printInput) {
      *
      * @return the yield
      */
-    public int getYield() {
+    public synchronized int getYield() {
         return yield;
     }
 
@@ -753,7 +753,7 @@ public int getYield() {
      *
      * @param yield the yield to set
      */
-    public void setYield(int yield) {
+    public synchronized void setYield(int yield) {
         this.yield = yield;
     }
 
@@ -761,7 +761,7 @@ public void setYield(int yield) {
      * Stop reading from the stream, invoking this will cause the read() to
      * return -1
      */
-    public void stop() {
+    public synchronized void stop() {
         stopped = true;
     }
 
diff --git a/CodenameOne/src/com/codename1/io/BufferedOutputStream.java b/CodenameOne/src/com/codename1/io/BufferedOutputStream.java
index d14680bbe1..0536ec40e1 100644
--- a/CodenameOne/src/com/codename1/io/BufferedOutputStream.java
+++ b/CodenameOne/src/com/codename1/io/BufferedOutputStream.java
@@ -137,7 +137,7 @@ public String getName() {
     /**
      * Flush the internal buffer
      */
-    public void flushBuffer() throws IOException {
+    public synchronized void flushBuffer() throws IOException {
         if (closed) {
             return;
         }
@@ -218,7 +218,7 @@ public synchronized void flush() throws IOException {
      *
      * @return time of the last activity on this stream
      */
-    public long getLastActivityTime() {
+    public synchronized long getLastActivityTime() {
         return lastActivityTime;
     }
 
@@ -227,7 +227,7 @@ public long getLastActivityTime() {
      *
      * @return the total amount of bytes written to this stream so far
      */
-    public int getTotalBytesWritten() {
+    public synchronized int getTotalBytesWritten() {
         return totalBytesWritten;
     }
 
diff --git a/CodenameOne/src/com/codename1/l10n/DateFormatSymbols.java b/CodenameOne/src/com/codename1/l10n/DateFormatSymbols.java
index f66a7ed3e8..6e4c8f4bfa 100644
--- a/CodenameOne/src/com/codename1/l10n/DateFormatSymbols.java
+++ b/CodenameOne/src/com/codename1/l10n/DateFormatSymbols.java
@@ -90,12 +90,14 @@ public void setAmPmStrings(String[] newAmpms) {
         ampms = newAmpms;
     }
 
-    public Hashtable<String, String> getResourceBundle() {
+    public synchronized Hashtable<String, String> getResourceBundle() {
         return resourceBundle;
     }
 
     public void setResourceBundle(Hashtable<String, String> newResourceBundle) {
-        this.resourceBundle = newResourceBundle;
+        synchronized (this) {
+            this.resourceBundle = newResourceBundle;
+        }
         // force rebuild
         ampms = null;
         months = null;
diff --git a/CodenameOne/src/com/codename1/ui/Display.java b/CodenameOne/src/com/codename1/ui/Display.java
index 7819459c59..82c02fecd5 100644
--- a/CodenameOne/src/com/codename1/ui/Display.java
+++ b/CodenameOne/src/com/codename1/ui/Display.java
@@ -2919,7 +2919,7 @@ public void setVirtualKeyboardListener(ActionListener l) {
      * @see #removeVirtualKeyboardListener(com.codename1.ui.events.ActionListener)
      * @since 6.0
      */
-    public synchronized void addVirtualKeyboardListener(ActionListener l) {
+    public void addVirtualKeyboardListener(ActionListener l) {
         if (virtualKeyboardListeners == null) {
             virtualKeyboardListeners = new EventDispatcher();
         }
@@ -2937,7 +2937,7 @@ public synchronized void addVirtualKeyboardListener(ActionListener l) {
      * @see #addVirtualKeyboardListener(com.codename1.ui.events.ActionListener)
      * @since 6.0
      */
-    public synchronized void removeVirtualKeyboardListener(ActionListener l) {
+    public void removeVirtualKeyboardListener(ActionListener l) {
         if (virtualKeyboardListeners != null) {
             virtualKeyboardListeners.removeListener(l);
         }
@@ -3422,7 +3422,7 @@ public void dispatchMessage(MessageEvent evt) {
      *
      * @param l the listener to add
      */
-    public synchronized void addWindowListener(ActionListener<WindowEvent> l) {
+    public void addWindowListener(ActionListener<WindowEvent> l) {
         if (windowListeners == null) {
             windowListeners = new EventDispatcher();
         }
@@ -3434,7 +3434,7 @@ public synchronized void addWindowListener(ActionListener<WindowEvent> l) {
      *
      * @param l the listener to remove
      */
-    public synchronized void removeWindowListener(ActionListener<WindowEvent> l) {
+    public void removeWindowListener(ActionListener<WindowEvent> l) {
         if (windowListeners != null) {
             windowListeners.removeListener(l);
         }
@@ -5222,7 +5222,7 @@ private class EdtException extends RuntimeException {
         private Throwable cause;
         private EdtException parent;
 
-        public synchronized Throwable getCause() {
+        public Throwable getCause() {
             return cause;
         }
 
diff --git a/CodenameOne/src/com/codename1/ui/Image.java b/CodenameOne/src/com/codename1/ui/Image.java
index 00198dd5a7..1edf86f690 100644
--- a/CodenameOne/src/com/codename1/ui/Image.java
+++ b/CodenameOne/src/com/codename1/ui/Image.java
@@ -1576,7 +1576,7 @@ public boolean requiresDrawImage() {
     }
 
     @Override
-    public synchronized void addActionListener(ActionListener l) {
+    public void addActionListener(ActionListener l) {
         if (listeners == null) {
             listeners = new EventDispatcher();
         }
@@ -1584,7 +1584,7 @@ public synchronized void addActionListener(ActionListener l) {
     }
 
     @Override
-    public synchronized void removeActionListener(ActionListener l) {
+    public void removeActionListener(ActionListener l) {
         if (listeners != null) {
             listeners.removeListener(l);
         }
diff --git a/CodenameOne/src/com/codename1/ui/html/ResourceThreadQueue.java b/CodenameOne/src/com/codename1/ui/html/ResourceThreadQueue.java
index d8808f0690..0aebe3f6f6 100644
--- a/CodenameOne/src/com/codename1/ui/html/ResourceThreadQueue.java
+++ b/CodenameOne/src/com/codename1/ui/html/ResourceThreadQueue.java
@@ -186,7 +186,7 @@ synchronized int getCSSCount() {
      *
      * @return the queue size
      */
-    int getQueueSize() {
+    synchronized int getQueueSize() {
         return (images.size() + queue.size()); // CSS files are added directly to queue while images to the images vector
         //return queue.size();
     }