mffowler,
This looks like a great mod which I have almost got to work on my site except within your 'menu_profile_mod.tpl' you include the following
file="buttons/button_vunc.tpl"
I am assuming that this is also a modified file or is calling a file that you have previously amended but unfortunately is not listed within your extensive expanations above.
Can you please advise what is included within this file or what .tpl your button_vunc is based upon.
Look forward to your response.