Hi,
It looks to me as if in the latest Pharo, the default font is rendered with the DejaVu bitmap font instead of Source Sans Pro.
Here is how the font looks like in Nautilus (look at the fonts in the top part):
<Screen Shot 2016-03-12 at 1.58.46 PM.png>
When I look in Settings, it says that it uses Source Sans Pro.
However, if I reload the fonts and set it again to Source Sans Pro, I get this picture with the correct rendering (look at the category name ���announcing"):
<Screen Shot 2016-03-12 at 2.18.09 PM.png>
Interestingly, the code font looks the same in both situations. Can you confirm this effect?
Cheers,
Doru