User blog comment:Deyvid Petteys/Play Dawnguard on PC Today/@comment-77.239.42.220-20120805130346

Bethesda is trying to fix a glitch that is really game breaking. Serana is a follower during the main quest of dawnguard, she will be with you most of the time when youre going through dangerouse caves. However in vampire lord form your damage will be reduced by about 80 percent because of her being your follower. this can only be fixed if she is dismissed. she can't be dismissed during the quest which sucks balls. hope this helps you guys understand.