diff --git a/main/src/com/google/refine/commands/Command.java b/main/src/com/google/refine/commands/Command.java
index bca60e07a..d4466c7f4 100644
--- a/main/src/com/google/refine/commands/Command.java
+++ b/main/src/com/google/refine/commands/Command.java
@@ -303,6 +303,7 @@ public abstract class Command {
 
         response.setCharacterEncoding("UTF-8");
         response.setHeader("Content-Type", "application/json");
+        response.setHeader("Cache-Control", "no-cache");
 
         Writer w = response.getWriter();
         JSONWriter writer = new JSONWriter(w);
diff --git a/main/src/com/google/refine/commands/project/GetModelsCommand.java b/main/src/com/google/refine/commands/project/GetModelsCommand.java
index 7276f9848..e8a2a39f1 100644
--- a/main/src/com/google/refine/commands/project/GetModelsCommand.java
+++ b/main/src/com/google/refine/commands/project/GetModelsCommand.java
@@ -85,6 +85,7 @@ public class GetModelsCommand extends Command {
         try {
             response.setCharacterEncoding("UTF-8");
             response.setHeader("Content-Type", "application/json");
+            response.setHeader("Cache-Control", "no-cache");
             
             Properties options = new Properties();
             JSONWriter writer = new JSONWriter(response.getWriter());
diff --git a/main/src/com/google/refine/expr/functions/booleans/Xor.java b/main/src/com/google/refine/expr/functions/booleans/Xor.java
new file mode 100644
index 000000000..e69de29bb
diff --git a/main/src/com/google/refine/importing/ImportingUtilities.java b/main/src/com/google/refine/importing/ImportingUtilities.java
index d908249b0..703023a16 100644
--- a/main/src/com/google/refine/importing/ImportingUtilities.java
+++ b/main/src/com/google/refine/importing/ImportingUtilities.java
@@ -65,7 +65,6 @@ import org.apache.commons.fileupload.ProgressListener;
 import org.apache.commons.fileupload.disk.DiskFileItemFactory;
 import org.apache.commons.fileupload.servlet.ServletFileUpload;
 import org.apache.commons.fileupload.util.Streams;
-import org.apache.commons.io.FileCleaningTracker;
 import org.apache.tools.bzip2.CBZip2InputStream;
 import org.apache.tools.tar.TarEntry;
 import org.apache.tools.tar.TarInputStream;
@@ -187,7 +186,6 @@ public class ImportingUtilities {
         };
         
         DiskFileItemFactory fileItemFactory = new DiskFileItemFactory();
-        fileItemFactory.setFileCleaningTracker(new FileCleaningTracker());
         
         ServletFileUpload upload = new ServletFileUpload(fileItemFactory);
         upload.setProgressListener(new ProgressListener() {
@@ -212,8 +210,10 @@ public class ImportingUtilities {
             }
         });
 
+        List tempFiles = upload.parseRequest(request);
+        
         progress.setProgress("Uploading data ...", -1);
-        parts: for (Object obj : upload.parseRequest(request)) {
+        parts: for (Object obj : tempFiles) {
             if (progress.isCanceled()) {
                 break;
             }
@@ -355,6 +355,13 @@ public class ImportingUtilities {
                     uploadCount++;
                 }
             }
+            
+            stream.close();
+        }
+        
+        // Delete all temp files.
+        for (Object obj : tempFiles) {
+            ((FileItem)obj).delete();
         }
         
         JSONUtilities.safePut(retrievalRecord, "uploadCount", uploadCount);
diff --git a/main/webapp/modules/core/images/logo-openrefine-30.png b/main/webapp/modules/core/images/logo-openrefine-30.png
index 031f745d0..b5b99df69 100644
Binary files a/main/webapp/modules/core/images/logo-openrefine-30.png and b/main/webapp/modules/core/images/logo-openrefine-30.png differ
diff --git a/main/webapp/modules/core/images/logo-openrefine-40.png b/main/webapp/modules/core/images/logo-openrefine-40.png
index 0b14113e5..dba86bd9b 100644
Binary files a/main/webapp/modules/core/images/logo-openrefine-40.png and b/main/webapp/modules/core/images/logo-openrefine-40.png differ
diff --git a/main/webapp/modules/core/scripts/facets/list-facet.js b/main/webapp/modules/core/scripts/facets/list-facet.js
index 38656b57e..4df634846 100644
--- a/main/webapp/modules/core/scripts/facets/list-facet.js
+++ b/main/webapp/modules/core/scripts/facets/list-facet.js
@@ -680,6 +680,7 @@ ListFacet.prototype._editExpression = function() {
         self._config.expression = expr;
 
         self._elmts.expressionDiv.text(self._config.expression);
+        self._elmts.changeButton.attr("title", "Current Expression: " + self._config.expression);
         if (self._config.expression == "value" || self._config.expression == "grel:value") {
           self._elmts.clusterLink.show();
         } else {
@@ -689,6 +690,7 @@ ListFacet.prototype._editExpression = function() {
         self.reset();
         self._updateRest();
       }
+      self._elmts.expressionDiv.hide();
     }
   );
 };
diff --git a/refine b/refine
index fb03850b8..feaaa6704 100755
--- a/refine
+++ b/refine
@@ -854,7 +854,7 @@ if [ ! -x "$JAVA" ] ; then
     error "Could not find the 'java' executable at '$JAVA', are you sure your JAVA_HOME environment variable is pointing to a proper java installation?"
 fi
 
-JAVA_VERSION=`$JAVA -version 2>&1 | grep version | cut -d ' ' -f 3 | egrep '^\"1\.(6|7)'`
+JAVA_VERSION=`$JAVA -version 2>&1 | grep version | cut -d ' ' -f 3 | egrep '^\"1\.(6|7|8)'`
 if [ -z "$JAVA_VERSION" ] ; then
     error "OpenRefine requires Java version 6 or later. If you have multiple versions of Java installed, please set the environment variable JAVA_HOME to the correct version."
 fi