Hi there,
It happened to me 2 weeks after buying the car in 2012 - this is typically what happens when the 12V battery starts to play up: for some weird reason, it triggers the VSC alert (Vehicle Stability Control) Don't worry about the actual alert...
I got Lexus to change it under warranty in December and 6 months later, it's back at it.
I'm getting the AA trickle charger today but tempted to go back to Lexus and tell them to change it again under the battery warranty...