Bottom-of-page ads interfering with post buttons on edit?

I'm having a problem when editing posting that stems from those ads at the bottom of every thread page - it seems when I go to edit my post (when it is the latest post at bottom of page), the ad will move out of its box and cover the "save" button in the reply window, requiring me to cancel or go to "advanced edit" just to open a new window to post the save.

Obviously I'm not making edits that often, but in the past couple of days it's happened to me about 4-5 times. Thought it would be worth mentioning to the site administrators as I'm sure I'm not the only one this has been happening to.