(Maybe the history I start with below is relevant, and maybe not; but
this is SO weird that it seems appropriate to share everything.  Also,
I hope it is acceptable to post to all 4 forums; they all seem
relevant.)

I recently discovered that the fonts that supposedly installed
automatically with my Windows XP hadn't.  However, my tech guy had
copied the \I386 folder to \Windows, and it had various *.tt_ files,
so I expanded them (via DOS) to *.ttf files.  I tried installing them
to my \Fonts folder, and they seemed to work.

The new ones that have an italic O in their icon in the Fonts folder,
and that come up with (OpenType) when viewed there, do work.  (Usually
their display from that Fonts folder shows only numbers, not letters,
but they all have letters when I use them in Word!)

These fonts include Tunga, Gautami, Georgia, Latha, and several
others.

However, the new ones with TT (TrueType) icons DON'T work.  They're
all listed in Word.  But when I highlight text and choose one of those
fonts, the display in the "Font" windows is in Times New Roman (I
believe)--even if the text isn't--rather than in the desired font, and
after I've supposedly applied the font, the toolbar confirms what my
eyes know:  That the text is still in whatever font it was in before.

These fonts include Andalus, David, Estrangelo Edessa, everything with
"New" or "UPC" in its name (except Courier New and Times New Roman,
which were already installed), and many others.

Any ideas?