Guys, don’t mess with my mind,

YOU MUST PUT ACCENTS ON UPPERCASES!

(ok, particularly in french…)

Orthographically, accents are required on uppercases, there is no other fonting rule preaching the opposite.
The lack of accent on uppercases slows the reading and make the reader invariably hesitate about the pronunciation, and even the meaning of the non accenting word/sentence.
Proof in the examples below (better impact if you understand french. If not, you probably will hesitate about the pronunciation, and even the meaning…) ;-).

accentsUpper

So, did you see how important accents on uppercases are? (Once again, especially if you speak french, otherwise some other things in life may be more important to you…)