After the 2.2.0 release last night, a few bugs were reported, but only one major one: malfunctioning carousels. To address that, @fat just pushed out a 2.2.1 hotfix release that fixes the bug. Upgrading should be super simple given the scope of this release.
Download Bootstrap 2.2.1(latest master ZIP)
Once more, apologies for any hiccups and happy Bootstrapping!