Trying to moderate and change a comments status (Review to Members) from 'collections' / 'comments' / 'full text view' results in a BAD REQUEST error. Status does not change. Using the Button! One has to Edit the comment to change the status.
I found this on my site but also on the b2evolution demo site.
General Support
b2evolution CMS Support Forums
I think the box is a test that may be implemented to encourage people to provide the basic info that you didn't URL :) and version :(