HSTCU Contamination
You're right, but this is known and has just recently been widely published, for example in Flight International.
We still have to wait for the conclusions of the Russian and German AAIB. It appears though, that the aircraft's right wing did not produce the necessary lift after rotation. Assuming that the aircraft commander acted wisely in deciding pro de-icing, one must focus on the ambient temperature and the nature of precipitation during the quick turn-around enroute to Hongkong. We can safely assume that the airframe itself must have been cold soaked after the first leg from Hannover to Almaty. We all know how the task-sharing during such a technical stop works: CM1 does all the paperwork, payments and overlooks the refuelling (and de-icing, when necessary), while CM2 goes through new WX-information and starts punching in the numbers for the 2nd leg into the FMS (which could have taken some time, given that he still was under supervision).
What I'd be interested in finding out: what type of de-icing fluid was used and were there any samples available in the days after the accident?
Something went terribly wrong that night and my guess is, that the occupants of this CL604 were doomed once they applied takeoff thrust...