POST /index.php/profile.php ?

Give me peace of mind - I have 1.2.10 installed - from my logs, I noticed someone running an automated query against my forum:

"POST /myforumpath/index.php/profile.php HTTP/1.0"

which returns an unstyled version of the index page - I see the same behavior on this very forum:

http://punbb.org/forums/index.php/profile.php

Is this someone trying to exploit an old vulnerability in PunBB? I can't see any code that could be compromised by a POST request to the page in question... so this didn't seem like a security issue to me - your thoughts?