After activating the plugin I began noticing small changes throughout my dashboard that were throwing me off. It looks like the
admin-style.css targeting of paragraph elements isn't specific enough and is applying to the whole WordPress dashboard.
Ideally the CSS should only be loaded up on the Facebook settings screen, but a quick fix would be to target the
p with the
.toplevel_page_facebook-settings class since I see that's added to the settings screen
A few of the other elements in that stylesheet should probably be better targeted to just that page as well -- I haven't noticed anything else looking off, but odds are the styles will cause something unexpected eventually.