Ed: Our new multi-domain plugin will solve this problem - it's got single sign on built in too!
I am having trouble with a new multi-domain plugin site(s).
I have WPMU setup at domain1.info that is hosting multiple blogs at multiple domains (with plugin).
blog1.info, blog2.info, blog3.info
All blogX.info sites point to the IP address of domain1.info where each of the blogX.info sites is appropriately returned.
I create a user in domain1.info and associate that account with all blogX.info sites.
When going to blog2.info, I cannot login to this blog with my user account. I am only returned to the login screen for blog2.info. No error appears.
Is this problem typical? If not, (I've done some searching and have not seen others speak of this) how might I go about diagnosing what is going wrong?