diff --git a/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/ImageReaderBase.java b/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/ImageReaderBase.java
index bae96a63..42179673 100644
--- a/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/ImageReaderBase.java
+++ b/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/ImageReaderBase.java
@@ -354,6 +354,10 @@ public abstract class ImageReaderBase extends ImageReader {
             Thread.currentThread().interrupt();
         }
         catch (InvocationTargetException e) {
+            if (e.getCause() instanceof RuntimeException) {
+                throw (RuntimeException) e.getCause();
+            }
+
             throw new RuntimeException(e);
         }
     }
diff --git a/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/IIOUtil.java b/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/IIOUtil.java
index 58177a46..e17376dc 100755
--- a/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/IIOUtil.java
+++ b/imageio/imageio-core/src/main/java/com/twelvemonkeys/imageio/util/IIOUtil.java
@@ -57,6 +57,9 @@ public final class IIOUtil {
 
     /**
      * Creates an {@code OutputStream} adapter that writes to an underlying {@code ImageOutputStream}.
+     * <p/>
+     * Note: The adapter is buffered, and <em>MUST</em> be properly flushed/closed after use,
+     * otherwise data may be lost.
      *
      * @param pStream the stream to write to.
      * @return an {@code OutputSteam} writing to {@code pStream}.
diff --git a/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java b/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
index 37f0566b..cf15f1f0 100644
--- a/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
+++ b/imageio/imageio-core/src/test/java/com/twelvemonkeys/imageio/util/ImageReaderAbstractTestCase.java
@@ -1441,6 +1441,72 @@ public abstract class ImageReaderAbstractTestCase<T extends ImageReader> {
         }
     }
 
+    @Test
+    public void testNotBadCaching() throws IOException {
+        T reader = createReader();
+        TestData data = getTestData().get(0);
+        reader.setInput(data.getInputStream());
+        
+        BufferedImage one = reader.read(0);
+        BufferedImage two = reader.read(0);
+       
+        assertNotSame("Multiple reads return same (mutable) image", one, two);
+
+        Graphics2D g = one.createGraphics();
+        try {
+            g.setColor(Color.WHITE);
+            g.setXORMode(Color.BLACK);
+            g.fillRect(0, 0, one.getWidth(), one.getHeight());
+        }
+        finally {
+            g.dispose();
+        }
+
+        assertTrue(one.getRGB(0, 0) != two.getRGB(0, 0));
+    }
+
+    @Test
+    public void testNotBadCachingThumbnails() throws IOException {
+        T reader = createReader();
+        
+        if (reader.readerSupportsThumbnails()) {
+            for (TestData data : getTestData()) {
+                reader.setInput(data.getInputStream());
+
+                int images = reader.getNumImages(true);
+                for (int i = 0; i < images; i++) {
+                    int thumbnails = reader.getNumThumbnails(0);
+                    
+                    for (int j = 0; j < thumbnails; j++) {
+                        BufferedImage one = reader.readThumbnail(i, j);
+                        BufferedImage two = reader.readThumbnail(i, j);
+
+                        assertNotSame("Multiple reads return same (mutable) image", one, two);
+
+                        Graphics2D g = one.createGraphics();
+                        try {
+                            g.setColor(Color.WHITE);
+                            g.setXORMode(Color.BLACK);
+                            g.fillRect(0, 0, one.getWidth(), one.getHeight());
+                        }
+                        finally {
+                            g.dispose();
+                        }
+
+                        assertTrue(one.getRGB(0, 0) != two.getRGB(0, 0));
+                    }
+                    
+                    if (thumbnails > 0) {
+                        // We've tested thumbnails, let's get out of here
+                        return;
+                    }
+                }
+            }
+
+            fail("No thumbnails tested for reader that supports thumbnails.");
+        }
+    }
+    
     @Ignore("TODO: Implement")
     @Test
     public void testSetDestinationBands() throws IOException {
diff --git a/imageio/imageio-ico/src/main/java/com/twelvemonkeys/imageio/plugins/ico/DIBImageReader.java b/imageio/imageio-ico/src/main/java/com/twelvemonkeys/imageio/plugins/ico/DIBImageReader.java
index a39ad143..11be7c15 100644
--- a/imageio/imageio-ico/src/main/java/com/twelvemonkeys/imageio/plugins/ico/DIBImageReader.java
+++ b/imageio/imageio-ico/src/main/java/com/twelvemonkeys/imageio/plugins/ico/DIBImageReader.java
@@ -63,7 +63,7 @@ import java.util.List;
  * @see <a href="http://en.wikipedia.org/wiki/ICO_(icon_image_file_format)">ICO file format (Wikipedia)</a>
  */
 // SEE http://en.wikipedia.org/wiki/ICO_(icon_image_file_format)
-// TODO: Decide wether DirectoryEntry or DIBHeader should be primary source for color count/bit count
+// TODO: Decide whether DirectoryEntry or DIBHeader should be primary source for color count/bit count
 // TODO: Support loading icons from DLLs, see
 // <a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwui/html/msdn_icons.asp">MSDN</a>
 // Known issue: 256x256 PNG encoded icons does not have IndexColorModel even if stated in DirectoryEntry (seem impossible as the PNGs are all true color)
diff --git a/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/CURImageReaderTestCase.java b/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/CURImageReaderTestCase.java
index 305b6576..8a6fc296 100755
--- a/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/CURImageReaderTestCase.java
+++ b/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/CURImageReaderTestCase.java
@@ -1,6 +1,7 @@
 package com.twelvemonkeys.imageio.plugins.ico;
 
 import com.twelvemonkeys.imageio.util.ImageReaderAbstractTestCase;
+import org.junit.Ignore;
 import org.junit.Test;
 
 import javax.imageio.ImageReadParam;
@@ -110,4 +111,11 @@ public class CURImageReaderTestCase extends ImageReaderAbstractTestCase<CURImage
     }
 
     // TODO: Test cursor is transparent
+
+    @Test
+    @Ignore("Known issue")
+    @Override
+    public void testNotBadCaching() throws IOException {
+        super.testNotBadCaching();
+    }
 }
\ No newline at end of file
diff --git a/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/ICOImageReaderTestCase.java b/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/ICOImageReaderTestCase.java
index 72036311..4ccb4e43 100755
--- a/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/ICOImageReaderTestCase.java
+++ b/imageio/imageio-ico/src/test/java/com/twelvemonkeys/imageio/plugins/ico/ICOImageReaderTestCase.java
@@ -1,9 +1,12 @@
 package com.twelvemonkeys.imageio.plugins.ico;
 
 import com.twelvemonkeys.imageio.util.ImageReaderAbstractTestCase;
+import org.junit.Ignore;
+import org.junit.Test;
 
 import javax.imageio.spi.ImageReaderSpi;
 import java.awt.*;
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 
@@ -63,4 +66,11 @@ public class ICOImageReaderTestCase extends ImageReaderAbstractTestCase<ICOImage
     protected List<String> getMIMETypes() {
         return Arrays.asList("image/vnd.microsoft.icon", "image/ico", "image/x-icon");
     }
+
+    @Test
+    @Ignore("Known issue")
+    @Override
+    public void testNotBadCaching() throws IOException {
+        super.testNotBadCaching();
+    }
 }
\ No newline at end of file
diff --git a/imageio/imageio-reference/src/test/java/com/twelvemonkeys/imageio/reference/JPEGImageReaderTestCase.java b/imageio/imageio-reference/src/test/java/com/twelvemonkeys/imageio/reference/JPEGImageReaderTestCase.java
index 07cb48e6..69da521b 100644
--- a/imageio/imageio-reference/src/test/java/com/twelvemonkeys/imageio/reference/JPEGImageReaderTestCase.java
+++ b/imageio/imageio-reference/src/test/java/com/twelvemonkeys/imageio/reference/JPEGImageReaderTestCase.java
@@ -4,6 +4,7 @@ import com.sun.imageio.plugins.jpeg.JPEGImageReader;
 import com.sun.imageio.plugins.jpeg.JPEGImageReaderSpi;
 import com.twelvemonkeys.imageio.util.ImageReaderAbstractTestCase;
 import com.twelvemonkeys.lang.SystemUtil;
+import org.junit.Ignore;
 import org.junit.Test;
 
 import javax.imageio.IIOException;
@@ -93,13 +94,16 @@ public class JPEGImageReaderTestCase extends ImageReaderAbstractTestCase<JPEGIma
     }
 
     @Test
+    @Ignore("Known issue")
     @Override
     public void testReadAsRenderedImageIndexOutOfBounds() throws IIOException {
-        try {
-            super.testReadAsRenderedImageIndexOutOfBounds();
-        }
-        catch (IIOException expected) {
-            // Known bug
-        }
+        super.testReadAsRenderedImageIndexOutOfBounds();
+    }
+
+    @Test
+    @Ignore("No test data with JFIF thumbnail")
+    @Override
+    public void testNotBadCachingThumbnails() throws IOException {
+        super.testNotBadCachingThumbnails();
     }
 }
diff --git a/imageio/imageio-thumbsdb/src/test/java/com/twelvemonkeys/imageio/plugins/thumbsdb/ThumbsDBImageReaderTestCase.java b/imageio/imageio-thumbsdb/src/test/java/com/twelvemonkeys/imageio/plugins/thumbsdb/ThumbsDBImageReaderTestCase.java
index a54cbc41..ee1e7440 100644
--- a/imageio/imageio-thumbsdb/src/test/java/com/twelvemonkeys/imageio/plugins/thumbsdb/ThumbsDBImageReaderTestCase.java
+++ b/imageio/imageio-thumbsdb/src/test/java/com/twelvemonkeys/imageio/plugins/thumbsdb/ThumbsDBImageReaderTestCase.java
@@ -33,6 +33,7 @@ import com.twelvemonkeys.imageio.util.ImageReaderAbstractTestCase;
 import com.twelvemonkeys.io.ole2.CompoundDocument;
 import com.twelvemonkeys.io.ole2.Entry;
 import com.twelvemonkeys.lang.SystemUtil;
+import org.junit.Ignore;
 import org.junit.Test;
 
 import javax.imageio.spi.ImageReaderSpi;
@@ -140,4 +141,11 @@ public class ThumbsDBImageReaderTestCase extends ImageReaderAbstractTestCase<Thu
             System.err.println("WARNING: Test skipped due to known bug in Java 1.5, please test again with Java 6 or later");
         }
     }
+
+    @Test
+    @Ignore("Known issue")
+    @Override
+    public void testNotBadCaching() throws IOException {
+        super.testNotBadCaching();
+    }
 }
\ No newline at end of file