Finding the origin of a browser cookie

Hi all,

Could anyone tell me how to find out what application on a server/site is setting a browser cookie?

It is a very specific cookie that I am hoping to find the origin of as it’s breaking my site.

This is the cookie…

Name: _#vdf
Content: 12432|1|20120303143426
Path: /
Send For: Any kind of connection
Accessible to Script: Yes
Created: Thursday, 2 February 2012 13:40:23
Expires: Wednesday, 29 October 2014 13:40:23

Many thanks