Sabre and shared wordpress installations?

I’m sharing the user DB with multiple sites using this method:

http://ww.wp.xz.cn/support/topic/two-blogs-working-from-one-user-database?replies=5

is there a way to share sabre’s confirmation status? right now if someone registers on blog 1, they get an error message on blog 2, 3, 4 and 5 if they try to log in.