in reply to Re^2: setting a cookie via an image
in thread setting a cookie via an image

It sounds like you simply have a broken implementation of intrasite user tracking. The usual logic is:

if ! tracking_cookie make new session ID log referer, browser, blah as initial data add entry page to track log for session ID send cookie with session ID when returning page else add page to track log for session ID

Once you have set a cookie (with a session ID) reloading a page will still send that cookie to you provided the path is correct.

cheers

tachyon