Reading this answer I found that á and è (and also right now in this question) characters from Déjà Dup
are shown different than the other characters (they are less "bold" than the others):
Link: Why does Déjà Dup say there is no space left?Why does Déjà Dup say there is no space left?
Is this my problem with Firefox 21 in Ubuntu 12.04.2 LTS or is a problem of the web (I don't know if the previous design had this problem)?
EDIT: I can see that several people have the same problem. Then, the problem is from client side or server side?