Since I upgraded from Ubuntu 17.10 to Ubuntu 18.04 whenever I open Thunderbird there is a globe icon, and sometimes also headphones icon, appearing in my list of new emails.

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These icons hide the titles of my emails. When I move the mouse over the icons they partially disappear. When I scroll down there is another globe icon further down the list.


Installing the fonts-symbola package fixes the problem.

sudo apt-get install fonts-symbola
  • This indeed fixed the problem. But what is the reason behind it ? :D – Basel J. Hamadeh Oct 9 '18 at 6:46

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