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.