Fixed in 10.1
It looks like the save as pdf is broken after I update to version 10.0.2. The labels in the plot become a mess.
Are there ways to fix it? The Export function works well though.
Here is a screenshot

I'm using OS X 10.10.1 (14B25)
update
It seems to be a frontend problem. Now I'm using a 10.0.2 kernel with a 10.0.1 frontend, which works great for me.
Save Selection AsI get garbage even for text, withSave Asall is fine. – b.gates.you.know.what Dec 12 '14 at 08:07Exportanyway. – Szabolcs Dec 12 '14 at 15:47Exportworks great, but what I really miss is the copying feature. Since the save as is broken, the copied image is also broken. – xslittlegrass Dec 12 '14 at 15:56