Ghasp -Ugerly fonts

[Roger]

I just updated Fedora 19 and now terminal fonts are ghastly, ergggh,  
ugggly, awfulll,  nothing like the clean crisp font when installed.

For that matter Thunderbird fonts changed to uggerly at the same time,

I have completely forgotten how to change terminal fonts. Still haven't 
found how to fix Thunderbird fonts either... Can someone point me in the 
right direction please.
TIA
Roger