Last modified: 2014-05-13 01:21:08 UTC
.editOptions specifies a light background color but inherits text. As a result on a dark skin that uses light text this becomes light text on light text. The fix for this would probably be to specify a text color.
Change 133042 had a related patch set uploaded by Daniel Friesen: Specify an explicit text colour on some components that change the background colour. https://gerrit.wikimedia.org/r/133042