Capital letter.

res/pyqso.glade

@@ -1055,7 +1055,7 @@ along with this program.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</pro
               <object class="GtkLabel" id="cabrillo_export_mycall_label">
                 <property name="visible">True</property>
                 <property name="can_focus">False</property>
-                <property name="label" translatable="yes">My callsign</property>
+                <property name="label" translatable="yes">My Callsign</property>
                 <property name="width_chars">12</property>
                 <property name="xalign">0</property>
               </object>