Fixing node to be inserted is from a different document context big.

.gitignore

@@ -6,4 +6,5 @@ build
 [Db]ebug*/
 obj/
 [Rr]elease*/
-_ReSharper*/
+_ReSharper*/
+*.vs10x

src/MacroDefInvocation.cs

@@ -103,7 +103,9 @@ private void ReplaceElementPlaceHolderWithInvocationContents(XmlElement invocati
 			Log(Level.Verbose, "Replacing element " + elementPlaceHolder.OuterXml + " in " + parentElement.OuterXml);
 			foreach (XmlNode definitionStep in invocationElementDefinition.ChildNodes)
 			{
-				parentElement.InsertBefore(definitionStep.CloneNode(true), elementPlaceHolder);
+                //needs to be imported because the context where it came from could be different (different xml file)
+                XmlNode actualNodeToBeInserted = parentElement.OwnerDocument.ImportNode(definitionStep, true);
+			    parentElement.InsertBefore(actualNodeToBeInserted, elementPlaceHolder);
 			}
 			parentElement.RemoveChild(elementPlaceHolder);
 		}

test/macrodefinitions.build

@@ -0,0 +1,14 @@
+<?xml version="1.0" ?>
+<project name="duplicate-test" xmlns="http://nant.sf.net/schemas/nant.xsd">
+	<loadtasks assembly="../build/Macrodef.dll" verbose="true" />
+
+	<macrodef name="elements-context-test">
+    <elements>
+      <element name="test-element"/>
+    </elements>
+    <sequential>
+      <test-element/>
+    </sequential>
+	</macrodef>
+</project>
+

test/tests.build

@@ -115,6 +115,17 @@
 		</if>
 	</target>
 
+	<include buildfile="macrodefinitions.build" />
+
+	<target name="test-element-from-different-context">
+		<elements-context-test>
+			<test-element>
+				<property name="test-element_executed" value="true"/>
+				<echo message ="This is a node from a different context"/>
+			</test-element>
+		</elements-context-test>
+		<fail if="${ test-element_executed != 'true'}" message="test-element_executed: expected true but was ${test-element_executed}"/>
+	</target>
 
 	<target name="test" depends="
 			test-macro-defined,
@@ -123,7 +134,8 @@
 			test-property-subst,
 			test-elements,
 			test-duplicate-macrodef,
-			test-duplicate-macrodef-redefinition
+			test-duplicate-macrodef-redefinition,
+			test-element-from-different-context
 			"/>
 
 </project>