This may be intentional, but any attempts to set the font, from the options window, to regular (i.e. not bold etc) sets it to bold instead. You CAN, however, set it to regular from the xml file, so I'm assuming it is a bug of some kind.
Also, as far as I can tell, blinkbats' dissappearing can cause the game to crash, as well.
By the way, great roguelike

much easier to get into than NetHack and those.