It was better...
It seams that a brand new 1.9 request less cookies.
After 2 days of hard work, the problem comes very (too much) often.
May be that as my tiki is cutomized, this introduce too much cookies ?
As i said i don't know much about cookies
But i have found the admin item cookie... empty. I have upload mydomaintiki cookies...it is a realy fresh one and i have yet 18 cookies...
As you seams like me fluent in french i'm ok to help you to solve this by giving you access to my admin and so on... (but private message )
Your wish are my command... about Tiki