I just contacted the support, why pictures aren't rotated in the original sizes. I got the fastest response I ever had from a technical support, not 10 minutes later I had the explanation (They don't change originals, what I think is a good thing (TM)).
This response was even faster than the responses I get from my colleague sitting at the desk opposite mine if I ask him stuff on programming. His responses usually start directly after the questions, but they don't end before 20 minutes passed ;-) (which means I learn a lot more than I want to on programming...)
So, Chapeau Ipernity! I am happy to see that there actually exists good customer support :-)