I got that same message 2x today. Been running stock 4.0.4 for a week now. So weird
Sent from my Nexus S 4G using XDA App
I got a bunch of these a while back on v3. Literally 60-70 messaged over the course of thirty minutes or so.
BUT- My sprint and Google Voice numbers are linked and the messages never registered in GV, just the messaging app. This has to mean it was something in the ROM right?