A+: special characters seemingly not supported

[raxod502]

I get an error when I try to use any non-ASCII character in A+:

     A+
     Copyright (c) 1990-2008 Morgan Stanley.  All rights reserved.
     This version is Release 4.22
     123 × 234
[token]:  undefined

A consequence of this is that I have not been able to implement the scope test for A+ since this requires variable assignment, which is done with a non-ASCII character.

I suspect, based on the appearance of the official A+ documentation online, that this is a character encoding problem:

Then again, I don't have the recommended "Netscape Navigator 4.0 or equivalent"...