Last night (this morning, whatever you would call it, March 31, 2012, 0100 UTC) V07 sent a null message, no data. When this family of stations sends a null it only sends 2 transmissions. So it was on the air at 0100z on 18074 kHz, and at 0120z on 15874 kHz. But it did not transmit at 0140z on 14374 kHz, as it would have if there had been a full message.
T!