Dust Spot in my Rx100

Hi

I got my Rx100 since XMas. I did lots of test and eveything was fine.

Yesterday I took the camara with me to Ski, the first pics were fine , not problems but after one shot I realised that there was a dust spot on the left top corner.

I thought that was some outside dirt but not it is inside at only appears after f5.

Today I contacted Amazon and due to the policy they had during Xmas they will replace it by a new unit without cost.

I must mention that I did not fell during the ski, the camera if not used was in the case and inside the jacket and it has never been exposed to any polution,sand etc..

I guess that probably the objective was not properly sealed and then with the movement it got the dust ..

Regards

xabain2003