1. Like some post
2. Go to the Reader (native), select "Post I like" category
3. Unlike some posts
4. Refresh -> unliked posts stay here (should not be there)

We can also add this enhancement:
When you unlike a post, it hides, and a pseudo-Toast appears saying "post unliked, undo ?". Clicking the undo button on Toast, makes the post appears and liked.

See https://code.google.com/p/romannurik-code/source/browse/misc/undobar/src/com/example/android/undobar/UndoBarController.java for the pseudo-Toast