[/snip]
Sounds like it might be your "code" folder.
You need to sign out of mabi and close the client fully before attempting this:
Unpack, go into mabinogi > data > move "code" to your desktop.
repack.
If it works, I was right.
If it doesn't, it was a different folder (you can add "code" back in). Try "xml", "local" or "db" next.
"gfx", "locale", "material" and "sound" should never ever be a problem. You can rule those out UNLESS they're the only ones left.
You might have an old UO Tiara and not realize it.
Also, for future reference, UO Tiara is mostly Graphics and Text mods.
Abyss is what lets you read CP and use bitmap font. c:
Tiny edit: If you can get Abyss to work for you, you don't need to use data packer or logue's mabipacker, eliminating the 'unpack' and 'repack' steps. Still need to fully close the client, though.