In 1.1.x (font set to default, Lucida Grande 12):


In 1.2.x (font set to default, Lucida Grande 12):


--> It's clear that the font used in the header is no longer Lucida Grande 12
In 1.2.x, font changed to Lucida Grande 11:


--> Whoa there! The header font changed to a serif font?!
Anyone know what's going on here? I have cleared font cache, no difference in behavior. Leopard, 10.5.1, AlPB 15".