Disable local video when moving to a conference call (had to explicitly "doClick" the button instead of just invoking setSelected(false) in order to trigger the exact operation).

src/net/java/sip/communicator/impl/gui/main/call/CallDialog.java

@@ -799,10 +799,10 @@ private void updateCurrentCallPanel(JComponent callPanel)
         {
             // First disable video.
             if (videoButton.isSelected())
-                videoButton.setSelected(false);
+                videoButton.doClick();
 
             if (fullScreenButton.isSelected())
-                fullScreenButton.setSelected(false);
+                fullScreenButton.doClick();
 
             settingsPanel.remove(videoButton);
             settingsPanel.remove(transferCallButton);