The contrast has been increased for input fields and check boxes have visually more distinct states as the following video shows.
One notable change is the addition of a warning that displays if Cloudflare blocks REST API requests. This issue was reported last September and it turns out that the PUT request is sometimes blocked by Cloudflare.
Gary Pendergast reached out to Cloudflare and the company deployed a fix earlier this week.
To see a full list of changes in this release, check out the changelog.