Several fixedwidth fonts return incorrect values for open characters, so $width($chr(32),courrier new,10) should return the same as $width(B,courrier new,10) right? for me it gives 3 for the first and 7 for the latter.
If this is just a plain error in the font (which it doesn't seem to be) then disregard my comment.

"courrier new" is not a valid font. Try "courier new" instead.

-genius_at_work

I don't know for sure, but this might be related to the bug I reported here.

nah Genius hit the nail

That's why he gets the big bucks.