I do not know if the following will illuminate the problem, but it might be worth trying.
Please try the following.
Then under Unicode Character Ranges, click on the Edit... button.
Is the Latin Extended-A box checked?
I remember reading once in the Unicode mailing list that Microsoft make their products check fonts before using them so as to ensure that things are correct, so if that were the problem, it is possible that a Microsoft product would first check and set the flag in a copy of the font, so the end user would not notice a problem when using the font with a Microsoft product.
Also, I do not know to what extent, if at all, Adobe products rely on a glyph having a Postscript name.
Do the glyphs that do not display each have a Postscript name?
20 July 2012