Anyone else encountering this problem? It just started today. My SMS messages under 160 characters are being split into multiple messages. When sending short messages, I'm hearing the "sent" sound twice. I just sent a friend a message, 137 characters long. It split it at 132 chars and she received 2 messages. I just updated to iOS5.1 last week and haven't experienced this issue before today. I'm on Sprint. Anyone else? Thanks!