In case you missed it, here is the video of the Polish president's visit to the Oval office last month. One of the first things President Obama says is:

"Something that the Polish people and the American people have long shared is not only a love of freedom but also a deep faith and resilience in the face of hardship."

[youtube=http://www.youtube.com/watch?v=iVxFfyBA6WM]

I think the best way to account for President Obama's excessive amount of smiling and furrowed-brow nodding during President Komorowski's remarks (minute 15), is to conclude that he is trying to atone for his earlier aside to the American media in the room regarding the tax agreement he struck with Republicans in Congress - it certainly seemed out of place.