I know I'm a bit tiresome submitting RFE's about mouse movement, but I think it's essential to get it right for the Steam release.

Launch the NotEye version of ADOM r52. Start a game. Press F10 to switch to ASCII mode. Click on a square (contiguous or not) to move to it. More often than not, the player will move to another square instead, adjacent to the one you have clicked, and regardless of the fact that there is an unambiguous cursor that clearly marks the square that you have actually clicked.