He knows that 0160 is a hard space in a lot of fonts, but what you must understand is that 0160 isn't a hard space in all fonts, in a lot it isn't.
Type //echo -a a $chr(160) b
in your status window, and then change your font to Terminal. You'll see what he's referring to.
The point is, if you use $chr(160) in your scripts, and those strings are outputted to a channel fex, it may not appear to everyone as it appears on your font.
Greets
