I have tried it on Fedora 17 and on Fedora 19.
Fedora might maybe have some kind of problem with the concept of a "system tray", which seems to be a mac and/or windows concept.
However, it might be the case that more grandmas use windows or mac than use various types of Linux? (Is Android a type of Linux?) so maybe that is okay?
FellowTraveler basically just says Fedora must be using a broken windowing system or something.
1. We have many users on Linux who are able to use it just fine -- it's not a problem with Linux.
2. Google this: "system tray" broken on Fedora.
Notice all the complaints and bug reports related to this issue on Fedora. (For other apps, like Dropbox, Skype, etc.)
3. Google these:
A. solved "system tray" fedora
B how to fix "system tray" fedora
(You can see there are many various solutions for this as well.)