Index: source/gui/COList.cpp
===================================================================
--- source/gui/COList.cpp   (revision 16968)
+++ source/gui/COList.cpp   (working copy)
@@ -158,11 +158,11 @@
        {
            float width = m_ObjectsDefs[def].m_Width;
            // Check if it's a decimal value, and if so, assume relative positioning.
            if (m_ObjectsDefs[def].m_Width < 1 && m_ObjectsDefs[def].m_Width > 0)
                width *= m_TotalAvalibleColumnWidth;
-           CPos leftTopCorner = m_CachedActualSize.TopLeft() + CPos(xpos, 4);
+           CPos leftTopCorner = m_CachedActualSize.TopLeft() + CPos(xpos, 0);
            if (mouse.x >= leftTopCorner.x &&
                mouse.x < leftTopCorner.x + width &&
                mouse.y < leftTopCorner.y + m_HeadingHeight)
            {
                if (def != m_SelectedDef)