I finally found the root cause of 401 for some of you. It has been fixed here in this version and as a plus, OAuth Echo is implemented so you can use OAuth to post picture to TwitPic, TwitGoo and yFrog.
Note for TwitPic and yFrog, my phone is too dump or my network are too bad to use them now. The test has been done on TwitGoo only. If you cannot use TwitPic or yFrog, please try TwitGoo.
Highly recommends to upgrade!