You can call it a bug or you can call it poor DNS habits... I run
http://Army.ca, and noticed that when I turned on subdomain independent cookies, the cookies were not set correctly. That is, they were set for army.ca, but the cookie name (I.E. SMFcookie10) was actually blank when the cookie was set.
This showed up as me having to re-log in at every visit.
I know I should technically be using
www.army.ca instead, but it still seems buggy that the cookie name disappears in this case. (I'm planning on using other server names such as gallery.army.ca, so I'd like to use subdomain independent cookies if possible...)
Cheers