Don’t know whether this thread is now defunct but I too am experiencing similar problems. Hope you’ll all excuse me as I’m pretty green. When in Visual editing mode top lines of text just disappear behind the editor buttons and even with the scroll bar available it’s not possible to scroll the text down to view or edit. By selecting the text editing tab I can get at it then which is fine in it’s own way if you feel comfortable working in that mode. I suspect it must be a bug but just wondering if anyone has any suggestions. It appears I’m running WP ver 4.2.4
