diff -r 6022d558ef7d -r 64d3ddf8d73b GUI/MainForm.cs
--- a/GUI/MainForm.cs	Thu Jul 26 06:51:19 2012 +0000
+++ b/GUI/MainForm.cs	Sat Aug 11 21:32:59 2012 +0000
@@ -647,6 +647,7 @@
               if (i <= control.MaxSoftwareValue &&
                   i >= control.MinSoftwareValue) {
                 MenuItem item = new MenuItem(i + " %");
+                item.RadioCheck = true;
                 manualItem.MenuItems.Add(item);
                 item.Checked = control.ControlMode == ControlMode.Software &&
                   Math.Round(control.SoftwareValue) == i;