Openid on wpmu problems

Hi. Im experiencing some difficulties with the openID plugin on WPMU 2.9.1.

WordPress is set up with subdomains.

blog.domain.com
first.blog.domain.com
second.blog.domain.com
and so on.

The opened rewrite rules do not kick inn on the main domain/ main blogg.
on all subblogs/subdomains the openid plugin is working fine.

The plugin is active when I try logging in the problem occurs when I return from the opened provider. I end up on domain.com/openid/consumer?janrain_nonce=2010-01-20T14%……. and I get a 404

I have tried saving the permalink settings as described several threads in the forum. But this dos not solve the problem.

In mysql in wp_2_options table rewrite_rules I find this
a:72:{s:11:”openid/(.+)”;s:28:”index.php?openid=$m…

But in wp_1_options table rewrite_rules
a:75:{s:40:”blogs/([^/]+)/([^/]+)/([^/]+)/([^/]+)/…
there is no reference too opened at all.

I have also tried modifying openid/common.php on line 619
from
$url .= ‘index.php/openid/’ . $service; to $url .= ‘?openid=’ . $service;

Any help would be appreciated.