For example, this user when displayed in the Android app doesn't show the
ǝ character properly in the username:
This happens in their profile and on posts.
Android app version 1.0.18 on Samsung Galaxy S3 and Android version 4.1.2.
It looks like the version of Roboto delivered on Android phones (keep in mind different versions of the OS supply different versions of Roboto and different subsets of it...) including my 4.4 testing device don't include this character, the schwa.
The version of Roboto I have downloaded locally from the Google design guide includes it, but it's a serious amount of effort to put in extra fonts on android devices, we're doing it some places already but I really don't want to do it everywhere just to fix this.