Pop-up menu's are too hard to click away from..
This is really just a minor issue of UI behaviour, but the behaviour of ADOM's pop-up menu's is different enough from 'standard' UI behaviour that I think it's worth considering. Consider the attached screen-shot - the menu that pops-up when clicking on the player takes up much of the screen, but if I decide I want to return to the game without clicking on anything, my instinct is to move the pointer to the left or right of the menu and click. (ie: click *off* the menu.) But, as you can see in the screen-shot, I have moved the pointer to the extreme left of the window, yet a click will still select the "inventory" item from the menu. IMHO this is not right.
Currently I could click away from the menu by moving the pointer above or below the menu, but as it's such a big menu, and there's little space above it (where my pointer is closest to) my instincts -- as they've been trained by Windows/OS-X/Unix over the years -- is to go for that big gap to the left and click somewhere there.
If the authors would like to keep some slack-space to the left and right of the menu, so the player doesn't have to hit it exactly, maybe 50 or 75 pixels the the left and right would be good? (I've drawn the dotted line at +75 pixels left and right.) But I really think any clicks outside of this dotted area -- if not anywhere outside of the menu -- should be interpreted at the player aborting the menu, rather than clicking on it.