Yes, it's normal.
The lens is reset to infinity at power on, and the the other noise is the anti-shake platform moving into place.
Double check that with your SuperSteadyShot switch set to On, that in the bottom right corner of the viewfinder you have a set of bars that move from 1 bar to 5 bars depending on camera movement (confirms SSS is working)
It will give the sensor a quick 'shake' (high frequency) as part of the power on to remove dust on the sensor.
You sort of ignore it after a few times - I would classify it as noticeable, but not intrusive, if that makes sense.
yeah, that is probably the image stabilisation system.
Yeah I thought it may be this, but just wanted to double check, as I am having other problems with it, to do with the sensor alignment :bang:
Hehe it that the seizure like flashing? As I posted a thread about that yesterday too! Lol