Weird SMS Problem

[dnt]

Notice today that I wasn't getting an txt or blank ones from my g/f. Only thing changed was that she uses a signature now. in the signature she inculdes " ¿ " at the end of the message. For some reason SMS doesnt get through or is blank. Anyways else have this problem. I'm on sprint and I hard reset the phone already.

It's weird that an upside down question mark would do that to my pda phone but not my other non pda phone.