User blog comment:Kirkburn/Technical Update: January 6, 2015/@comment-5558012-20150106183750/@comment-452-20150106194941

You have misunderstood me, I am telling you that *I* used them to eliminate the possibilities that my customisations were stopping the bug from occurring.

Could you please outline the steps required the replicate this bug?

Edit: My editor preference is set to "source editor", when I edit a page, the textarea is scrolled to the top, as shown here: