Facebook says its new app icon was just a glitch after all 9to5MacWhy is the Facebook icon black? Social media users have some theories for widespread issue Asbury Park PressFacebook’s Surprise Change to Its Classic Icon Was Just a Glitch Business InsiderFacebook black icon caused by technical issue. Here’s how to fix it NorthJersey.comNo, the black Facebook app icon isn’t a new logo. Here’s why you’re seeing it. Mashable