diff --git a/src/main/java/org/apache/commons/collections4/ClosureUtils.java b/src/main/java/org/apache/commons/collections4/ClosureUtils.java
index b339a1a0e..fd09abe71 100644
--- a/src/main/java/org/apache/commons/collections4/ClosureUtils.java
+++ b/src/main/java/org/apache/commons/collections4/ClosureUtils.java
@@ -37,7 +37,6 @@ import org.apache.commons.collections4.functors.WhileClosure;
  * <li>Invoker - invokes a method on the input object
  * <li>For - repeatedly calls a closure for a fixed number of times
  * <li>While - repeatedly calls a closure while a predicate is true
- * <li>DoWhile - repeatedly calls a closure while a predicate is true
  * <li>Chained - chains two or more closures together
  * <li>If - calls one closure or another based on a predicate
  * <li>Switch - calls one closure based on one or more predicates
@@ -46,7 +45,14 @@ import org.apache.commons.collections4.functors.WhileClosure;
  * <li>NOP - does nothing
  * <li>Exception - always throws an exception
  * </ul>
- * All the supplied closures are Serializable.
+ * <p>
+ * Since v4.1 only closures which are considered to be unsafe are
+ * Serializable. Closures considered to be unsafe for serialization are:
+ * <ul>
+ * <li>Invoker
+ * <li>For
+ * <li>While
+ * </ul>
  *
  * @since 3.0
  * @version $Id$
diff --git a/src/main/java/org/apache/commons/collections4/FactoryUtils.java b/src/main/java/org/apache/commons/collections4/FactoryUtils.java
index bb5887f86..6d7763574 100644
--- a/src/main/java/org/apache/commons/collections4/FactoryUtils.java
+++ b/src/main/java/org/apache/commons/collections4/FactoryUtils.java
@@ -26,12 +26,18 @@ import org.apache.commons.collections4.functors.PrototypeFactory;
  * for the Factory functor interface. The supplied factories are:
  * <ul>
  * <li>Prototype - clones a specified object
- * <li>Reflection - creates objects using reflection
+ * <li>Instantiate - creates objects using reflection
  * <li>Constant - always returns the same object
  * <li>Null - always returns null
  * <li>Exception - always throws an exception
  * </ul>
- * All the supplied factories are Serializable.
+ * <p>
+ * Since v4.1 only factories which are considered to be unsafe are
+ * Serializable. Factories considered to be unsafe for serialization are:
+ * <ul>
+ * <li>Prototype
+ * <li>Instantiate
+ * </ul>
  *
  * @since 3.0
  * @version $Id$
diff --git a/src/main/java/org/apache/commons/collections4/TransformerUtils.java b/src/main/java/org/apache/commons/collections4/TransformerUtils.java
index 05a94f5ef..ad6265a36 100644
--- a/src/main/java/org/apache/commons/collections4/TransformerUtils.java
+++ b/src/main/java/org/apache/commons/collections4/TransformerUtils.java
@@ -56,7 +56,14 @@ import org.apache.commons.collections4.functors.SwitchTransformer;
  * <li>Exception - always throws an exception
  * <li>StringValue - returns a <code>java.lang.String</code> representation of the input object
  * </ul>
- * All the supplied transformers are Serializable.
+ * <p>
+ * Since v4.1 only transformers which are considered to be unsafe are
+ * Serializable. Transformers considered to be unsafe for serialization are:
+ * <ul>
+ * <li>Invoker
+ * <li>Clone
+ * <li>Instantiate
+ * </ul>
  *
  * @since 3.0
  * @version $Id$