I agree with Rusty.
Years ago (with typewriters) it was not easy to fullfill all the accents, and it was "allowed" not to write accents in capitals. It was not right but nobody will say anything.
A lot of years ago, with computers more in use, then was clearly said it will be no more allowed. So Rusty (and the RAE
) is right.
I have recently answer a post,asking about Árabe
http://forums.tomisimo.org/showthread.php?t=1767
and it must be Árabe, unless your system only allows Arabe.
saludos
PD I have find a good post who explains that
http://ruhig.0catch.com/IDIOMA/acentos.html