User blog comment:Sarah Manley/Try the New Wikia Editor/@comment-755865-20110629152645/@comment-126761-20110630151413

Update: looks like it's related to the use of createboxes on your wiki's new article introduction (mediawiki:newarticletext) - browsers don't support them being used in that fashion in the new layout (due to nested forms, I'm told).

Anyway, I believe it's fixable by using the second style listed on here instead. I can help out, if desired.