In our project we needed to have a TagsInput component field with auto-completion, which we have implemented with Flat UI 1.2.1.
However, after upgrading to Flat UI 1.2.5 our auto-completion code stopped working. It turns out, the library no longer supports jQuery UI Autocomplete replacing it with Twitter Typeahead (not the most recent version). Reverting to previous version of Flat UI was not a desirable option, therefore we have modified Flat UI to add support for Typeahead library in TagsInput field.
Please see the demo for more information.