This is to prevent "shouting." Yea, there's a feature like that heh. Feature description: Prevent your users 'shouting' in their thread titles/message text by changing all-uppercase titles to capitalization only on the first letters of some words.
I think it's more important to disable shouting, than the difference of Vffc and VFFC. Kim also agrees, who nagged me about it on AIM lol. So I'll keep it this way.