Hey James,
When you say, "when I click on a URL within this domain" and it is sending a lnk_o call instead of a regular page view call, do you mean that the click is initializing a lnk_o call or on the following page load there is the lnk_o server call instead of the page view?
Is there a page where I can see this happening? I tried to hit
http://spinside-dev.lfg.com/ourcompany/brandadverts/brndresctr/Pages/default.aspx but it wouldn't let me.
Thanks