Bruce,
You can reproduce this in the BasicBrowseandForm(1) (NetTalk8 c9 example). Try the following:
1) change character set to 'utf-8' (It is 'ISO-8859-1' in my example set)
2) compile and run
3) edit one user name by adding extended character (alt+248) degree sign. This will look fine.
4) TpsScan the MAILBOXE.TPS. You will notice A-hat on that user name.
5) While in TpsScan, edit another user name by adding the same extended character.
6) Now run the web app and check those two user names.
If you cannot reproduce the error, I can send you my example. I'm using c9-10376 and NT8.24.
Thanks,
Sukhendu