Intermittent bugs are the worst.
This is happening to me randomly in Safari 7.1: when I try to create a new page, what I type won't show up sometimes. It seems like the first line (or two) of the edit window is "hidden" under the edit toolbar. It just happened to me several times in a row on a page similar to https://meta.wikimedia.org/w/index.php?title=Talk:Tech/News/2014/39&action=edit&redlink=1 .
It also happens on existing pages: I remember I had difficulties placing templates at the top of a page on Meta, so I just tried to edit https://meta.wikimedia.org/w/index.php?title=Talk:Community_Engagement_(Product)/Media_Viewer_consultation/Other&action=edit , and the first two lines are "missing". Nothing happens if I try to scroll up and down, with mouse or keyboard (except I can't see the cursor blinking if it is on one of those lines).

Version: 1.25-git
Severity: normal
OS: Mac OS X 10.9