Whenever I try to drag/drop pages to the pages area, they'll disappear as soon as I try to save my changes. Categories work fine. Any ideas? I'm using BF 1.3.3 and WP 1.9.1 (en_EN). Below a link to a little screenrecording of the problem.
YouTube screen recording
edit: problem solved. One of my plugins (qtranslate) was causing the problem.