Android :: ACTION_HEADSET_PLUG Broadcast ?

I've tried these phones: Motorolla Backflip 1.5, Nexus One 2.1

Basically I register BroadcastReceiver to get ACTION_HEADSET_PLUG broadcast and look on 3 extras that come in intent:

state
name
microphone

Here is the description from API:

* state - 0 for unplugged, 1 for plugged.
* name - Headset type, human readable string
* microphone - 1 if headset has a microphone, 0 otherwise

Issue #1: Broadcast comes when activity is started (not expected), when screen rotation happens (not expected) and when headset/headphones plugged/unplugged (expected).

Issue #2: Backflip phone (1.5) sends null for state + microphone, 'No Device' as name when headset/headphones unplugged, and sends null for state + microphone, 'Stereo HeadSet'/'Stereo HeadPhones' as name when headset/headphones plugged.

UPDATE: T-Mobile G1 with 1.6 behaves the same as Backflip phone.

Nexus even worse, it always sends null for state + microphone, 'Headset' as name when headset/headphones plugged or unplugged.

Question: How it can be explained that API is broken so much on both 1.5 and 2.1 versions and different devices, manufactures?

UPDATE:

Code in onCreate of main Activity:

CODE:.........................

Now the code of BroadcastReceiver:

CODE:................................