Index: /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsNetwork.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsNetwork.cpp	(revision 42267)
+++ /trunk/src/VBox/Frontends/VirtualBox/src/settings/machine/UIMachineSettingsNetwork.cpp	(revision 42268)
@@ -220,5 +220,5 @@
     if (m_pMACEditor->text().size() < 12)
     {
-        strWarning = tr("the value of the MAC address field in not complete.");
+        strWarning = tr("the MAC address must be 12 hexadecimal digits long.");
         fValid = false;
     }
@@ -229,5 +229,5 @@
         if (validator.indexIn(m_pMACEditor->text()) != 0)
         {
-            strWarning = tr("the second digit in the MAC Address field cannot be odd, "
+            strWarning = tr("the second digit in the MAC address may not be odd "
                             "as only unicast addresses are allowed.");
             fValid = false;