[Plugin: Mingle Forum] New Post and Reply Code Buttons Lining Up Vertically

I’m running WP 3.1 with the latest Mingle Forum version on the “Adventure Journal” theme. The code/format buttons that appear above the text box for posting a new thread or replying to one are aligning vertically instead of horizontally; one per row in one single column. See this image for a visual.

Any ideas on how to correct this? There’s no functional problem with it…it’s just ugly and I doubt it was intended to do this!

http://wordpress.org/extend/plugins/mingle-forum/