User blog comment:DaNASCAT/Technical Update: March 17, 2015/@comment-5558012-20150318152309/@comment-452-20150318153920

I see what you're seeing.


 * If you load the page with the right rail collapsed, that gap appears, and stays when you expand it again.
 * If you load the page with the right rail expanded, all is fine, but if you collapse it, that gap appears, and stays when you expand it again.

I'm also seeing the new preview images not being centered vertically in the same situation.