Yes, I've tried that. No joy.
In any case, the fault occurs only in double-sided A4 print in Enhanced mode. In Standard mode, the second page registers fine. So any image shift option that should apply only on the second page of Enhanced quality printing would be mad.
Also, double-sided Enhanced mode printing on US Letter paper works fine.
Basically, this is a behaviour that applies only when printing on A4 paper size. Weird how a printer designed in the USA should only work properly when printing on US Letter paper, eh?
So I have now received a new firmware that fixes this problem. It's taken almost five months, but at least it has been fixed.
For anyone else using A4 paper on WorkCentre 3335/3345, the new firmware is available here: