"superscript" asterisk is gone!

Hello:

I had been using a space (hex: 32) followed by a composing character
(hex: 20f0) to get a superscript asterisk. I no longer see the
"superscript" asterisk.

* I did an o/s upgrade in the past 6 months or so, and so that could be
why the "superscript asterisk" is no longer visible
* possibly vim has been "upgraded" so that the "superscript asterisk" is
no longer visible

I used it, as an example, in comments to indicate that a
conjugate-transpose of a matrix was indicated: A* (except that the
asterisk was superscripted): A ⃰ (I put it into the browser just before
this parenthesized text, and I can see it via seamonkey).

Any ideas as to what's going on, and can it be fixed?

Regards,
Chip Campbell

P.S. With gvim, I use set guifont=Luxi\ Mono\ Bold\ 11 , in case its a
font issue. Haven't changed that font in a looong time.

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