Set visibility View. VISIBLE to postThumbHolder somewhere. In the else block of your if (post.get... clause.
It has to do with how android makes the background of the list items into bitmaps as soon as you start scrolling. To make sure your image views are visible after scrolling you must also set that property everytime the adapters getView is called do this in the else part of your variable check.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.