[wp-testers] Login cookies issue using multisite on different domains

[Davide Ruda]

Hi, I have an issue with login cookies.

I'd like to create a network of sites using the new Wordpress, I'm 
running last development version (3.0-RC1-15059).

I'm using Wordpress in a multisite configuration, with 
DOMAIN_CURRENT_SITE = admin.mydomain.com

So, every site I create has by default an url like 
"site1.admin.mydomain.com". After creating the site, I change domain and 
siteurl in www.site1.com

Everything work well but the user's login, because WP try to set the 
login cookie on the domain ".admin.mydomain.com" instead of ".site1.com" 
... if I configure back domain and siteurl in "site1.admin.mydomain.com" 
I'm able to login.

Do you think this can considered as a bug, or am I using Wordpress in a 
wrong way?