André, thanks for response.

The device we tested on was iphone 5s.

Please find attached relevant part of CSS which does not work without monkey-patch I made:

https://gist.github.com/k41n/11142946

If there is way to trigger orientation change columns recreation without messing with forks I will gladly return to upstream, so let me know if I am doing something wrong.

Observed behaviour was following: if I am loading page with landscape orientation, I have 3 columns with entries. They are still 3 when I rotate iPhone. But if I load page holding device in portrait orientation, CSS works and I see 2 columns. With offered patch applied I observe intended behaviour: number of columns changes on device rotation.