Amarino is Android 2.2 compatible, however there is never a guarantee that it works on all modded Android verison. As far as I know, there is no phone out there with an official Android 2.2 build. (only the leaked Nexus One build)
Currently, Amarino calls the official disconnect command of the Android Bluetooth API.
Nevertheless, we should move this discussion to Google Code Archive - Long-term storage for Google Code Project Hosting.
so that other users can contribute. (you might open an issue about that with detailed information about your Android version, handset model, etc.)