diff --git a/build.gradle b/build.gradle
index b0e231db1..32a83b44e 100644
--- a/build.gradle
+++ b/build.gradle
@@ -26,6 +26,7 @@ allprojects {
 	}
 	group = 'org.igniterealtime.smack'
 	sourceCompatibility = 1.7
+	targetCompatibility = sourceCompatibility
 	version = shortVersion
 	if (isSnapshot) {
 		version += '-SNAPSHOT'
@@ -97,7 +98,7 @@ import org.apache.tools.ant.filters.ReplaceTokens
 task prepareReleasedocs(type: Copy) {
 	from 'resources/releasedocs'
 	into releasedocsDir
-	filter(ReplaceTokens, tokens: [version: version, releasedate: buildDate])
+	filter(ReplaceTokens, tokens: [version: version, releasedate: buildDate, targetCompatibility: targetCompatibility.toString()])
 }
 
 task distributionZip(type: Zip, dependsOn: [javadocAll, prepareReleasedocs]) {
diff --git a/documentation/gettingstarted.html b/documentation/gettingstarted.html
index 3c44682fe..08da7ea85 100644
--- a/documentation/gettingstarted.html
+++ b/documentation/gettingstarted.html
@@ -23,10 +23,8 @@ important classes and concepts.
 JAR Files and Requirements
 </p>
 
-Smack is meant to be easily embedded into any existing JDK 1.5 or later Java application.
-It has no external dependencies (except for the Jingle voice chat functionality) and is optimized
-to be as small as possible. The library ships as several JAR files to provide more flexibility
-over which features applications require:
+Smack is meant to be easily embedded into any existing Java application.
+The library ships as several JAR files to provide more flexibility over which features applications require:
 
 <ul>
     <li><tt>smack-core.jar</tt> -- provides core XMPP functionality. All XMPP features that are
diff --git a/resources/releasedocs/README.html b/resources/releasedocs/README.html
index d1a220e4c..962c43fbc 100644
--- a/resources/releasedocs/README.html
+++ b/resources/releasedocs/README.html
@@ -154,18 +154,27 @@ hr {
 </table>
 
 <p>
-Thank you for downloading Smack!
-<p>
+Thank you for downloading Smack! This version of Smack is compatible
+with JVMs @targetCompatibility@ or higher. If you dont' use a
+dependency resolution system, like gradle or maven, then you will need
+to download at least
+the <a href="http://www.extreme.indiana.edu/xgws/xsoap/xpp/mxp1/">Xml
+Pull Parser 3rd Edition (XPP3) library</a> or any other library that
+implements the XmlPullParser interface
+(like <a href="http://kxml.org/">kXML</a>).
+</p>
 
+<p>
 Start off by viewing the <a href="documentation/index.html">documentation</a>
 that can be found in the "documentation" directory included with this distribution.
-<p>
+</p>
 Further information can be found on the <a href="http://www.igniterealtime.org/projects/smack">
 Smack website</a>. If you need help using or would like to make contributions or
 fixes to the code, please visit the 
 <a href="https://community.igniterealtime.org">online forum</a>.
- 
-<p><b>About the Distribution</b><p>
+</p>
+
+<p><b>About the Distribution</b></p>
 
 The <tt>smack-core.jar</tt> file in the main distribution folder. The optional
 <tt>smack-extensions.jar</tt> contains the <a href="documentation/extensions/index.html">Smack extensions</a> 
diff --git a/smack-compression-jzlib/src/main/java/org/jivesoftware/smack/compression/jzlib/JzlibInputOutputStream.java b/smack-compression-jzlib/src/main/java/org/jivesoftware/smack/compression/jzlib/JzlibInputOutputStream.java
index 356eef8a0..68e4d16d5 100644
--- a/smack-compression-jzlib/src/main/java/org/jivesoftware/smack/compression/jzlib/JzlibInputOutputStream.java
+++ b/smack-compression-jzlib/src/main/java/org/jivesoftware/smack/compression/jzlib/JzlibInputOutputStream.java
@@ -58,7 +58,9 @@ public class JzlibInputOutputStream extends XMPPInputOutputStream {
     @Override
     public OutputStream getOutputStream(OutputStream outputStream) throws IOException {
         final DeflaterOutputStream os = new DeflaterOutputStream(outputStream);
-        os.setSyncFlush(true);
+        if (flushMethod == FlushMethod.SYNC_FLUSH) {
+            os.setSyncFlush(true);
+        }
 
         return os;
     }
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java b/smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
index f51907ecd..4629dd1fe 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java
@@ -20,6 +20,7 @@ package org.jivesoftware.smack;
 import org.jivesoftware.smack.packet.Session;
 import org.jivesoftware.smack.proxy.ProxyInfo;
 import org.jivesoftware.smack.util.DNSUtil;
+import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.dns.HostAddress;
 import org.jxmpp.util.XmppStringUtils;
 
@@ -191,6 +192,9 @@ public class ConnectionConfiguration implements Cloneable {
     }
 
     protected void init(String serviceName, ProxyInfo proxy) {
+        if (StringUtils.isEmpty(serviceName)) {
+            throw new IllegalArgumentException("serviceName must not be the empty String");
+        }
         this.serviceName = serviceName;
         this.proxy = proxy;
 
@@ -645,6 +649,9 @@ public class ConnectionConfiguration implements Cloneable {
     }
 
     private void initHostAddresses(String host, int port) {
+        if (StringUtils.isEmpty(host)) {
+            throw new IllegalArgumentException("host must not be the empty String");
+        }
         hostAddresses = new ArrayList<HostAddress>(1);
         HostAddress hostAddress;
         hostAddress = new HostAddress(host, port);
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/compression/Java7ZlibInputOutputStream.java b/smack-core/src/main/java/org/jivesoftware/smack/compression/Java7ZlibInputOutputStream.java
index 906a8e1f0..0f7933faa 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/compression/Java7ZlibInputOutputStream.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/compression/Java7ZlibInputOutputStream.java
@@ -48,6 +48,9 @@ public class Java7ZlibInputOutputStream extends XMPPInputOutputStream {
     private final static boolean supported;
     private final static int compressionLevel = Deflater.DEFAULT_COMPRESSION;
 
+    private static final int SYNC_FLUSH_INT = 2;
+    private static final int FULL_FLUSH_INT = 3;
+
     static {
         Method m = null;
         try {
@@ -100,25 +103,23 @@ public class Java7ZlibInputOutputStream extends XMPPInputOutputStream {
 
     @Override
     public OutputStream getOutputStream(OutputStream outputStream) {
+        final int flushMethodInt;
+        if (flushMethod == FlushMethod.SYNC_FLUSH) {
+            flushMethodInt = SYNC_FLUSH_INT;
+        } else {
+            flushMethodInt = FULL_FLUSH_INT;
+        }
         return new DeflaterOutputStream(outputStream, new Deflater(compressionLevel)) {
             public void flush() throws IOException {
                 if (!supported) {
                     super.flush();
                     return;
                 }
-                int count = 0;
-                if (!def.needsInput()) {
-                    do {
-                        count = def.deflate(buf, 0, buf.length);
-                        out.write(buf, 0, count);
-                    } while (count > 0);
-                    out.flush();
-                }
                 try {
-                    do {
-                        count = (Integer) method.invoke(def, buf, 0, buf.length, 2);
+                    int count;
+                    while ((count = (Integer) method.invoke(def, buf, 0, buf.length, flushMethodInt)) != 0) {
                         out.write(buf, 0, count);
-                    } while (count > 0);
+                    }
                 } catch (IllegalArgumentException e) {
                     throw new IOException("Can't flush");
                 } catch (IllegalAccessException e) {
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/compression/XMPPInputOutputStream.java b/smack-core/src/main/java/org/jivesoftware/smack/compression/XMPPInputOutputStream.java
index 41308243f..6fd289325 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/compression/XMPPInputOutputStream.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/compression/XMPPInputOutputStream.java
@@ -20,6 +20,21 @@ import java.io.InputStream;
 import java.io.OutputStream;
 
 public abstract class XMPPInputOutputStream {
+
+    protected static FlushMethod flushMethod;
+
+    /**
+     * Set the used flushed method when compressing data. The default is full flush which may not
+     * achieve the best compression ratio, but provides better security against certain attacks.
+     * Only use sync flush if you fully understand the implications.
+     * 
+     * @see <a href="https://blog.thijsalkema.de/blog/2014/08/07/https-attacks-and-xmpp-2-crime-and-breach/">Attacks against XMPP when using compression</a>
+     * @param flushMethod
+     */
+    public static void setFlushMethod(FlushMethod flushMethod) {
+        XMPPInputOutputStream.flushMethod = flushMethod;
+    }
+
     protected String compressionMethod;
 
     public String getCompressionMethod() {
@@ -31,4 +46,9 @@ public abstract class XMPPInputOutputStream {
     public abstract InputStream getInputStream(InputStream inputStream) throws Exception;
 
     public abstract OutputStream getOutputStream(OutputStream outputStream) throws Exception;
+
+    public enum FlushMethod {
+        FULL_FLUSH,
+        SYNC_FLUSH,
+    }
 }
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java b/smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java
index ac5059848..48bc56f1b 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java
@@ -279,13 +279,23 @@ public class StringUtils {
     }
 
     /**
-     * Returns true if the given CharSequence is not null or empty.
+     * Returns true if the given CharSequence is null or empty.
      *
      * @param cs
-     * @return true if the given CharSequence is not null or empty
+     * @return true if the given CharSequence is null or empty
      */
     public static boolean isNullOrEmpty(CharSequence cs) {
-        return cs == null || cs.length() == 0;
+        return cs == null || isEmpty(cs);
+    }
+
+    /**
+     * Returns true if the given CharSequence is empty
+     * 
+     * @param cs
+     * @return true if the given CharSequence is empty
+     */
+    public static boolean isEmpty(CharSequence cs) {
+        return cs.length() == 0;
     }
 
     public static String collectionToString(Collection<String> collection) {
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java
index 08a0abfff..855cba222 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5Proxy.java
@@ -73,7 +73,12 @@ public class Socks5Proxy {
     private static Socks5Proxy socks5Server;
 
     private static boolean localSocks5ProxyEnabled = true;
-    private static int localSocks5ProxyPort = 7777;
+
+    /**
+     * The port of the local Socks5 Proxy. If this value is negative, the next ports will be tried
+     * until a unused is found.
+     */
+    private static int localSocks5ProxyPort = -7777;
 
     /* reusable implementation of a SOCKS5 proxy server process */
     private Socks5ServerProcess serverProcess;
@@ -142,6 +147,9 @@ public class Socks5Proxy {
     * @param localSocks5ProxyPort the port of the local Socks5 proxy to set
     */
    public static void setLocalSocks5ProxyPort(int localSocks5ProxyPort) {
+       if (Math.abs(localSocks5ProxyPort) > 65535) {
+           throw new IllegalArgumentException("localSocks5ProxyPort must be within (-65535,65535)");
+       }
        Socks5Proxy.localSocks5ProxyPort = localSocks5ProxyPort;
    }
 
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/offline/OfflineMessageManager.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/offline/OfflineMessageManager.java
index 36be3e8c4..b62172140 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/offline/OfflineMessageManager.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/offline/OfflineMessageManager.java
@@ -154,20 +154,24 @@ public class OfflineMessageManager {
             }
         });
         PacketCollector messageCollector = connection.createPacketCollector(messageFilter);
-        connection.createPacketCollectorAndSend(request).nextResultOrThrow();
-        // Collect the received offline messages
-        Message message = (Message) messageCollector.nextResult();
-        while (message != null) {
-            messages.add(message);
-            message = (Message) messageCollector.nextResult();
+        try {
+            connection.createPacketCollectorAndSend(request).nextResultOrThrow();
+            // Collect the received offline messages
+            Message message = (Message) messageCollector.nextResult();
+            while (message != null) {
+                messages.add(message);
+                message = (Message) messageCollector.nextResult();
+            }
+        }
+        finally {
+            // Stop queuing offline messages
+            messageCollector.cancel();
         }
-        // Stop queuing offline messages
-        messageCollector.cancel();
         return messages;
     }
 
     /**
-     * Returns an Iterator with all the offline <tt>Messages</tt> of the user. The returned offline
+     * Returns a List of Messages with all the offline <tt>Messages</tt> of the user. The returned offline
      * messages will not be deleted from the server. Use {@link #deleteMessages(java.util.List)}
      * to delete the messages.
      *
@@ -181,17 +185,23 @@ public class OfflineMessageManager {
         List<Message> messages = new ArrayList<Message>();
         OfflineMessageRequest request = new OfflineMessageRequest();
         request.setFetch(true);
-        connection.createPacketCollectorAndSend(request).nextResultOrThrow();
 
         PacketCollector messageCollector = connection.createPacketCollector(PACKET_FILTER);
-        // Collect the received offline messages
-        Message message = (Message) messageCollector.nextResult();
-        while (message != null) {
-            messages.add(message);
-            message = (Message) messageCollector.nextResult();
+        PacketCollector resultCollector = connection.createPacketCollectorAndSend(request);
+
+        try {
+            // Collect the received offline messages
+            Message message = (Message) messageCollector.nextResult();
+            while (message != null) {
+                messages.add(message);
+                message = (Message) messageCollector.nextResult();
+            }
+            resultCollector.nextResultOrThrow();
+        }
+        finally {
+            messageCollector.cancel();
+            resultCollector.cancel();
         }
-        // Stop queuing offline messages
-        messageCollector.cancel();
         return messages;
     }
 
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/ConfigureForm.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/ConfigureForm.java
index f6f6cb76a..297557daf 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/ConfigureForm.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/ConfigureForm.java
@@ -577,12 +577,23 @@ public class ConfigureForm extends Form
 	 * Determines if subscriptions are allowed.
 	 * 
 	 * @return true if subscriptions are allowed, false otherwise
+	 * @deprecated use {@link #isSubscribe()} instead
 	 */
+	@Deprecated
 	public boolean isSubscibe()
 	{
-		return parseBoolean(getFieldValue(ConfigureNodeFields.subscribe));
+		return isSubscribe();
 	}
 
+    /**
+     * Determines if subscriptions are allowed.
+     * 
+     * @return true if subscriptions are allowed, false otherwise
+     */
+    public boolean isSubscribe() {
+        return parseBoolean(getFieldValue(ConfigureNodeFields.subscribe));
+    }
+
 	/**
 	 * Sets whether subscriptions are allowed.
 	 * 
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/FormField.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/FormField.java
index 1e7ba1bd8..5b8172f5c 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/FormField.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/FormField.java
@@ -313,7 +313,7 @@ public class FormField {
      */
     public static class Option {
 
-        public static final String ELEMNT = "option";
+        public static final String ELEMENT = "option";
 
         private final String value;
         private String label;
@@ -352,7 +352,7 @@ public class FormField {
 
         public XmlStringBuilder toXML() {
             XmlStringBuilder xml = new XmlStringBuilder();
-            xml.halfOpenElement(ELEMNT);
+            xml.halfOpenElement(ELEMENT);
             // Add attribute
             xml.optAttribute("label", getLabel());
             xml.rightAngelBracket();