Steps:

1. Open http://en.wikipedia.beta.wmflabs.org/wiki/7thfeb?veaction=edit
2. Scroll to bottom
3. Select the gallery
4. Cursor right
5. Press a letter.

Expected outcome: Cursor ends up in slug after the gallery, with an 'a' in it; focus stays.

Actual outcome: Focus moves to the top of the document, then restores when 'a' is typed.

Version: unspecified
Severity: normal
URL: http://en.wikipedia.beta.wmflabs.org/wiki/7thfeb?veaction=edit
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=68708