So yes, a BIG improvement. Massive. Looks like the DS1000Z firmware team have returned.
For general information, I come from a really old firmware (04.02.sp4) and upgrading to 04.04.01.01 has slowed down the vertical movement noticeably when in STOP mode. I tried just before the update with the test signal and in STOP mode it was so very fluid - almost CRO-like, I'd say - a now it's not noticeably different from the RUN mode.
It appears, though, that in RUN mode things got a little better. The waveform appear to shim a little bit, but... oh, well.
Ok, now I'll go see what is new... :-)
Oh, BTW: does it matters to have only one or all four channel when doing an autocalibration?