document.cookie does not return all cookie

[zeroonea]

i did test about document.cookie but seem it does'nt return all cookie of current site?
when i'm test in my vbb forum, it's miss vbbuserid and some important cookie

i'm using firefox 3 and can use some addon to read all cookie but document.cookie does not?

(and all the path of some missed cookie is "/")

what problem here?

[DrDoc]

Welcome to WebmasterWorld!

Have you confirmed that the domain and path match exactly?