slight problem with cookies (using cookie button)

in my normal FF install i used cookie button along with the setting "allow sites to set ccokies" DISABLED in FF (privacy page). Then I just allow some sites to set their cookies.
It seems to work ok with PFF, except with google.

Im in france, so the default google page is google.fr, which i dont want.
So i select "google in english" on the google.fr page, and that directs me to the proper google.com page, but ONLY if I enable "allow sites to set ccokies" on the privacy page. This shouldnt be needed (and isnt needed in FF) as the cookie from google is stored, as i allowed it with cookie button.
Its like PFF doesnt read the cookie from google as long as I dont check "allow sites to set cookies"...

Please note that once a cookie is stored, FF reads it, even if "allow site to set cookies" is uncheked.

thanks