Many things (like +map) rely on a monospace font; Times New Roman is not a monospace font, while FixedSys, Terminal, Lucida Console, Andale Mono, Prestige Elite, Monaco, and Courier are. If one would like to attempt to calibrate their MU* Client to a more ASCII-friendly font, please refer to the images in the in-game 'news calibrate' file.
In-game, 'news calibrate' should look a little like this, if one is using the Terminal font:
For comparison, this is how it would look with the Times New Roman font:
Obviously, one probably doesn't want to use Times New Roman.