Are you using the latest version 2.0.29? You can determine this by hovering your mouse over the word Eventide or UltraChannel in the GUI. If you don't, my understanding is that the latest release should fix this. If you do have it installed, do you have the font "Monaco" installed on your system? I think the font should be built into the plug-in now, but in case I'm wrong, installing the "Monaco" font should fix it.
Please let us know how it goes either way, as this is something we're trying to have fixed.
Thanks, and sorry for the trouble,