diff --git a/Ghidra/Framework/Docking/src/main/java/docking/action/MenuData.java b/Ghidra/Framework/Docking/src/main/java/docking/action/MenuData.java
index 2e4450a464..ed80b7ad0b 100644
--- a/Ghidra/Framework/Docking/src/main/java/docking/action/MenuData.java
+++ b/Ghidra/Framework/Docking/src/main/java/docking/action/MenuData.java
@@ -15,6 +15,8 @@
  */
 package docking.action;
 
+import java.util.Arrays;
+
 import javax.swing.Icon;
 
 import docking.DockingUtils;
@@ -158,6 +160,9 @@ public class MenuData {
 	}
 
 	public void setMenuPath(String[] newPath) {
+		if (newPath == null || newPath.length == 0) {
+			throw new IllegalArgumentException("Menu path cannot be null or empty");
+		}
 		MenuData oldData = cloneData();
 		menuPath = processMenuPath(newPath);
 		int newMnemonic = getMnemonic(newPath);
@@ -204,20 +209,15 @@ public class MenuData {
 	}
 
 	private static String[] processMenuPath(String[] menuPath) {
-		if (menuPath != null && menuPath.length > 0) {
-			menuPath[menuPath.length - 1] = processMenuItemName(menuPath[menuPath.length - 1]);
+		String[] copy = Arrays.copyOf(menuPath, menuPath.length);
+		if (copy != null && copy.length > 0) {
+			copy[copy.length - 1] = processMenuItemName(copy[copy.length - 1]);
 		}
-		return menuPath;
+		return copy;
 	}
 
 	private static String processMenuItemName(String string) {
-		int indexOf = string.indexOf('&');
-		if (indexOf >= 0 && indexOf < string.length() - 1) {
-			return string.substring(0, indexOf) + string.substring(indexOf + 1);
-
-		}
-		return string;
-
+		return string.replaceFirst("&", "");
 	}
 
 	public String getMenuItemName() {
diff --git a/Ghidra/Framework/Docking/src/test/java/docking/action/MenuDataTest.java b/Ghidra/Framework/Docking/src/test/java/docking/action/MenuDataTest.java
new file mode 100644
index 0000000000..5cc98e9151
--- /dev/null
+++ b/Ghidra/Framework/Docking/src/test/java/docking/action/MenuDataTest.java
@@ -0,0 +1,64 @@
+/* ###
+ * IP: GHIDRA
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package docking.action;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+/**
+ * Tests to protect the MenuData class intended behavior
+ */
+public class MenuDataTest {
+
+	/**
+	 * Mnemonic should be 'T', parsed out of the location of the ampersand in
+	 * 3rd argument in the menuPath.
+	 * The mnemonic is not explicitly set.
+	 */
+	@Test
+	public void testMenuDataParsesMnemonicFromAmpersand() {
+		MenuData menuData = new MenuData(new String[] { "One", "Two", "&Three" });
+		assertEquals(menuData.getMnemonic(), 'T');
+	}
+
+	/**
+	 * Mnemonic should be 'h' based on the value that was explicitly set
+	 */
+	@Test
+	public void testMenuDataPassedMnemonicWins() {
+		MenuData menuData = new MenuData(
+			new String[] { "One", "Two", "&Three" }, null, null, 'h', null);
+		assertEquals(menuData.getMnemonic(), 'h');
+	}
+
+	/**
+	 * The setMenuPath method should fail to set an invalid (empty) menuPath
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void testBreakMenuPath() {
+		MenuData menuData = new MenuData(new String[] { "One", "Two", "Three" });
+		menuData.setMenuPath(new String[0]);
+	}
+
+	/**
+	 * The MenuData constructor should fail to accept an invalid (empty) menuPath
+	 */
+	@Test(expected = IllegalArgumentException.class)
+	public void testBreakMenuPath2() {
+		MenuData menuData = new MenuData(new String[] {});
+	}
+}