TinyMCE Advanced — Disappearing Font Size?

I’ve been using TinyMCE Advanced for about a year now, and everything has been fine until now.

Suddenly, the option to change the font size has completely disappeared. Am I crazy?

There is still an option to change the style (paragraph, heading, etc.) but nothing about changing the font size.

I’ve searched online for answers (no luck), deleted and re-installed the plug-in (no luck), and reviewed the plugin authors website (no luck).

I’m using the Chunk theme.

Any ideas?

[Moderator Note: No bumping, thank you.]