There's now a minimap! It can be disabled from the settings page.
The stairs up are now colored yellow in ASCII mode, and have an up arrow attached to the tile in graphical mode. The up arrow is drawn on top of whatever else is on the tile, so if something is standing on the stairs it's easier to see them.
The default preferences are now set to show creature stats on the sidebar. (This only applies to people who haven't played the game yet)
Gameplay changes:
Flying creatures who move over water while on fire now have their fire put out
Code/modding changes:
Tilesets can now have separate colors for the ground and the walls in ASCII mode (and the Graveyard has been updated to use this feature to more closely match its appearance in graphical mode)
There's now a Map:get_blocking_feature function to check and return a movement-blocking feature in a tile