In Safari on a Mac, using keyboard arrow keys doesn't result in scrolling

[paulproteus]

Steps to reproduce:

• Start by using Safari on a Mac.

• Open a new Etherpad document, e.g. using demo.sandstorm.io.

• Make the document longer than one screen tall by e.g. copying and pasting the contents until you would need to scroll to see the entire document.

• Click inside the text of the document.

• Press and hold the keyboard down arrow key in an attempt to make the document scroll down.

Expected behavior:

• The viewable area of the text moves down. (This happens on Chromium on Debian for me.)

Actual behavior:

• No change in the viewable area of the text.

Notes:

• This was reported by an avid Sandstorm user to support@. I verified the issue by having @jadeqwang test out the above steps-to-reproduce on her Mac.

[pzelchenko]

Same here. Reported to Sandstorm:

Cursor up/down does not scroll. In Safari, at least. Haven't checked others.