Braille readers read Arial font characters incorrectly

Dear all

In a meeting with a focus group a few days ago (i'm currently managing a
re-design of an intranet for a UN agency in Rome) a user suggested that
certain characters in the Arial font are misread by Braille readers. (He
specifically mentioned "i"  which he said is displayed as three strokes or
something...)

I have not heard about this before, and don't seem to be able to find
information about this on the web either.

So, does any one have experience of Braille readers reading fonts
incorrectly? If we are aware of such anomalies one may be able to
circumvent it using CSS to provide alternative fonts to ensure the
information is received correctly.

Many thanks
Harry