Autoblog not working all over wpmu sites

On skola.karlstad.se we have over 400 subsites.
Autblog works on some of them but not on al of them.
Can´t find out why not.

The feeds validate.
eg. http://skola.karlstad.se/digr/category/digr/feed/ there is no problem with.
But still we get red reports al the day long.

Need some helt to troubleshoot the issue.