Not printing special characters

After upgrading to 5.1.132 over the holiday shutdown (from 3.0), some
of my users are reporting an odd behavior in printing job travelers
and I was wondering if anyone else is seeing the same thing.
On 3.0, we were able to include specific symbols in the operation
comments. These symbols still appear on screen, but they do not
appear on the printed traveler. Symbols that we frequently use are
the "degree sign" (Alt+0176), "plus-minus sign" (Alt+0177) and
the "diameter symbol" (Alt+0216). You can view the code numbers if
you go into the Character Map Application
(start/programs/accessories/system tools).
We are running WIN2K clients on a WINNT4 server. I'm pretty sure it's
a Vantage issue rather than an OS problem, but I'm not certain. Any
thoughts or ideas would be appreciated. Thanks.

John Elder
Penn State Tool & Die