Index: gtk2_ardour/mixer_strip.cc
===================================================================
--- gtk2_ardour/mixer_strip.cc  (revision 1070)
+++ gtk2_ardour/mixer_strip.cc  (working copy)
@@ -1082,11 +1082,13 @@
 void
 MixerStrip::hide_clicked ()
 {
+       hide_button.set_sensitive(false);
        if (_embedded) {
                 Hiding(); /* EMIT_SIGNAL */
        } else {
                _mixer.hide_strip (this);
        }
+       hide_button.set_sensitive(true);
 }