Fonts in graphs displayed as question marks
If I view a graph in Safari (latest version) all of the text appears as question marks. The same page in Firefox displays fine. The problem only appears when a section of the page is displayed using flash player.
For example the adobe page Adobe - Flash Player displays like this;

I'm using a new iMac running OS 10.11.2. I also have the latest flash player and have restarted the machine after updates.
If anyone can help I'd really appreciate it.
Thanks
