In a font I recently bought, a glyph is too small for my liking (the glyph in question is the "radical"). I therefore decided altering the glyph slightly to show a longer extension from the baseline (I hope it's clear what I mean with this).

After doing some research, I have the following software at my disposal for changing the glyph:
- FontForge
- FontLab Studio 5
To check how the new font looks, I also have trial versions of
- FontExplorer X Pro
- Suitcase Fusion 6

(The final product is to be a math font for use with the TeX typesetting system.)

Editing any font is correctly reflected in both pieces of font editing software (Studio as well as FF).

However, something strange happens when I check the font in the font management software. FontExplorer does *not* show the edited glyph, while Suitcase Fusion *does* show the new glyph. Converting the OpenType file to readable font metrics for my typesetting software, the *wrong* glyph shows up in the glyph table.

I've tried changing some things around a bit. I can reproduce the problem on both of my windows 7 systems (laptop/PC), I can reproduce the problem with either of two pieces of font editing software. Also, this happens for any glyph.

I've already tried changing the font cache, reinstalling everything (windows included), or trying different fonts, glyphs, and so on. The problem persists.

For reproducability, consider Comic Sans (which I believe comes with any windows distribution): a TrueType flavoured OpenType font.
I can change any glyph, say the capital letter A. To edit the glyph, I open up FontForge* and double click any glyph. I move an anchor point to a random location (you can change two anchor points to be sure). Afterwards, I save the font as a FontForge file (just to be sure) through File>Save as... In the new window I can save the font as say, comic2.sfd. I then export/generate the font through File>Generate Fonts..., where I'll select a fontname, say comic2.ttf, where I'll set options: "TrueType", "No Bitmap Fonts" and "No Rename". I only force glyph names to: "Validate Before Saving". I have not changed any settings in FontForge, so the "Options" window just shows defaults.

After validating, an error shows up saying that "the font contains errors":
- Wrong Direction
- Missing Points at Extrema
- Glyph contains overlapped hints (in the same hintmask)

I'm unsure what these mean, but I tell FontForge to go ahead anyway, so I clicked "Save".

The newly generated font now doesn't show the correct glyph.

* I tried several releases, but I tested most with the latest release as well as the July 14, 2012 release.

Element / Corriger Direction

Might be a glitch with Font Explorer.
I use the old free version (still on 1.2.3.) to manage my fonts. I will generate fresh versions to check metrics and edits and so forth work in other apps on my system, activating and de activating using Font Explorer. Sometimes, I'll delete an old version of a font, from Font Explorer. Load up and activate the new version, and the alts/edits, won't show in Font Explorer until I quit and relaunch. So possibly just a Font Explorer bug?

Thank you for your answer.

I guess I wasn't completely clear: the converted versions of the font also show the wrong glyph (in renditions typeset by TeX). This suggests the problem stretches further than just FontExplorer.