Button color
In 7.9rc1 The background of the "Save changes" button that you see when you edit an issue/mr/wiki page is black.
This has already been fixed in master.
git bisect shows https://gitlab.com/gitlab-org/gitlab-ce/commit/521785157b1f6f729e77fdad2ec83492120e8c7c as the commit fixing it.
I guess it just has to be merged into 7-9stable.
/cc @marin @dzaporozhets