Looks like I have an annoying dust bunny and the lens cannot be removed so no chance of easily doing it myself like with a DSLR!
I'm hoping this will get fixed under warranty.
f/16 - very annoying!
f/11 - still v bad
f/8 - not good
f/5.6 - blurry now
f/4 - quite blurred
f/2.8 - very blurred but still visible
update 9/1/14: just noticed that the "dust bunny" has shifted a bit! I'm hoping this is a sign that it's not "welded" to the sensor and might drop off.
I normally keep my GR in the pannier on my bicycle, so I'm hoping that the constant vibration might eventually shift the dust altogether.
I have put the camera loose in one of the pannier pockets so more vibration is transferred to the camera and with the front face (lens side) down as well.