+ Slight increase to font size for sub-nav drop down on primary links menu. I don't think you need to worry about the sub-sub-nav (like all the case studies titles under case studies under experience).
+ Slight increase to font size for secondary links at top (Careers, Choose Language, Contact)

I wish I could better define "slight increase", but if you look at sandbox, I think you'll be able to gauge what that increase should be.