First of all I think that the problem I’m going to describe depends from my chrome 25.0.1364.172 installation.
Suddenly freepbx toolbar has started to use a wrong font.
(not the body of the page but only toolbar).
I’ve tried everything to restore default font (reinstall, clear user profile, etc), but it seems that nothing can fix it.
The issue does not appear if I use another browser or chrome on another windows installation.
Thanks to all