Camera Lock again

I found exception at Camera class Lock() API, then my android version up by 2.3.6.
but, I found it to be good !
My androids, NexusOne and xperia ray are ok follow program.
It is point to do MediaRecorder.setVideoSize().

_mediarecorder = new MediaRecorder();
_mediarecorder.setCamera(_camera);
_mediarecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
_mediarecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
_mediarecorder.setVideoSize(640, 480);//Add
_mediarecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);

source code is here.
Please suggest your android issue by twitter or mail, I would try to clear up your issue.