If I open the city improvements section of the hiergamenon, select an improvement and click on the page back button to go back to the improvements list, a blank hiergamenon spread (two blank pages) appears. If I click on the page back again, the city improvements list does return, but it's on the last pages, not on the ones I was browsing earlier (the game doesn't remember where I was a moment ago).

Also, when I want to look through the hiergamenon, only the bottom left corner of the hiergamenon icon is clickable. Minor annoyance, but something I'd like to see fixed.§