F20 has blurry font rendering

[Michael Cronenworth]

I've upgraded a few machines and felt the font rendering was harder to read in 
F20. I took some F19 screenshots and F20 screenshots and found my eyes were correct.

Thunderbird
F19: http://i.imgur.com/rgnFmU6.png
F20: http://i.imgur.com/ceOIM0n.png

Firefox
F19: http://i.imgur.com/8MXxy0N.png
F20: http://i.imgur.com/669DSwI.png

I do not see any font changes mentioned in the F20 ChangeSet list so someone 
snuck a font change in.

Anyone else run into this?