Review Board 1.7.19 is out, with some bug fixes and support for GitHub's two-factor authentication.
In recent days, there's been a large number of attempts to compromise accounts on GitHub. By activating two-factor authentication, you can better protect your account.
Review Board was lacking support for their two-factor authentication, which was a problem when linking an account for a repository for the first time. The workaround was to temporarily disable two-factor authentication, but that's no longer necessary. When linking an account with two-factor auth for the first time, GitHub will send you an access code, which Review Board will prompt you for.
If you have already linked a GitHub account, you won't have to do anything more. We use revokable OAuth tokens when talking to GitHub using a linked account, which is separate from your auth credentials.
Along with this, there's a page caching improvement for review request pages, some usability fixes, and other bug fixes.
See the release notes for more information.