Why is one folder on my Samsung Galaxy SII not being properly showed on PC?
I finally found the solution (actually I even had left it behind...). Sometime after I posted this question I create another folder and after a while it began to have the same problem. Today I realized that both folder had one common caracteristic: they contained characters beyond the basic ASCII Table (one was called "Músicas" and the other, "Vídeos". When I renamed them ("Musicas" and "Videos", respectively), the issue was solved.