What does the orange triangle in the target column of Android Device Chooser window mean?
According to this mailing list thread, that just means you're utilising an optional library and Eclipse can't be sure it's installed on the device. Eclipse knows you're using a compatible version of the API, it's just not sure about the optional extension you're using. So you should be fine, as long as the app works on the phone.
I have the same exclamation point next to my target but the code complile and run OK. In my opinion the warning appears because the device target has a different API version than project one. In my case the Android project is build with 2.3.3. but my Samsung device has installed 2.3.4
