Announcing MantisHub Modern UI
We just rolled out the new MantisHub release featuring our brand new modern UI. The new UI is based on Bootstrap and provides MantisHub with a fresh modern look.
Administrators will have the ability to switch between the modern and classic UIs via the Manage page. The switch will apply to all users of that MantisHub.

At the moment, the modern UI is only available via MantisHub, with the plan to integrate into Mantis Bug Tracker version 2.0.