x-mirror and extruding?

Hi, I apologize in advance if this has been discussed but I searched and couldn’t find an answer.

QUESTION:

what is proper protocol for extruding faces while using x-mirror? I end up getting incomplete extrusions. Thanks.

X-Mirror not really for creating mirrored geometry, it allows you to edit existing geometry across the x-axis. If you want to model symmetrically you can use the mirror modifier http://wiki.blender.org/index.php/Doc:2.6/Manual/Modifiers/Generate/Mirror