Overnight my TV turns on by itself!

This morning I found my TV was turned on and displaying the WD logo screen saver! The TV and WD TV Live were both off the previous evening, in fact the WD had not been used for quite a few days. The clock on my cooker was still showing the correct time, which is a good indication that no mains power had been lost in the night. I have the latest 1.06.4 firmware. Anyone else had this problem? I have disable HDMI CEC control for the time being so at least my TV won’t be wasting electricity if it happens again!