상단탭을 왼쪽으로 드래그하면 폴더별로 플레이가 가능하다.

http://www.google.com/support/forum/p/android/thread?tid=69b6774bbe77e236&hl=en
You can go to settings> applications and then on gallery clear data. This removes the picasa photos . Then don't sync picasa again. Worked perfectly for me.
Go to.
Settings> applications> manage applications> all> gallery> clear data