FontIcon+ button not showing up

Can't get the FontIcon+ button to show up under TinyMCE. Followed the directions in the docs, purged cache and history from Firefox, uninstalled and reinstalled, downloaded the plg_fonticonsbtn_fix.zip file on the forum, none of these worked. Running Joomla 3.1.5. Please help!

Hi jchan,
The button is actually there but for some reason the button is hidden (see the screencast here : d.pr/v/DXxt) . Will make some tests on my localhost and back to you soon

Hi jchan, I have uploaded a fixed version to your website, and look like fonticons now working properly. Can you please check it?

Works fine now, did you determine the reason why the button wasn't appearing?

There's a class definition that we should add for that button style in Joomla 3.x that we've missed. That's all jchan.

And what would that class definition be and where would I put it? It works fine in JCE, but not in Tiny.