First step for determining the source of the problem: do the fonts load in TextEdit?

If so, it is probably the application that is the problem. Try placing the fonts in the Libary > Application Support > Adobe > Fonts folder and launching InDesign again.

If not, it is probably the font manager that is the problem. Try placing the fonts directly in your [user] > Library > Fonts folder.

More on font managers.

I wonder if this is the old case of fonts. When some of the manufacturer did (Bold) (Italic) etc. and though only the Regular showed up - the rest were available by using the B for bold, I for Italic, etc.

I remember when Fontographer 1.0 was first out - they had a special extension so you could do this with your typefaces -- happy to say, I didn't and wouldn't ever touch it.

True, forgot about the style-linking issue. Does the font change to the proper italic when you hit the Italic button, Marty?

Brilliant! The fonts (all 4 variants) DID show up in TextEdit, but in InDesign bolding or italicizing the Regular did not work. So I copied the font family into InDesign's font folder and voila, there they are. Now, why don't they show up in Quark, even though the fonts are activated in FEx? Is there a workaround for that? And why does this happen with the rare font, most of them seeming to activate and deactivate properly, even in Dreaded QuarkXPress?

Thanks for the help guys.

Try placing them in your User > Library > Fonts folder.

FEX is really great, but it's still young and there are kinks to be worked out.

Had tried that, to no avail. So, working on transitioning the few remaining recurring Quark layouts into InDesign.

Thanks again for the tips.

Transitioning from Quark to InD for any reason is good for your long-term sanity.