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Off of this I found that especially on the fingers, toes, ankles and wrists the use of Puppet Master caused extreme rotations. This seems to be a glitch in Puppet Master but I was able to stop this behaviour by copying poses to an altered Antonia: I used "natural" values for the limits on the questionable parts and told Poser to use limits. And this brings me to the thing I wanted to ask since weeks: may it be necessary to alter the limits in the figure or ist it better to leave them as is? I think I always used Poser and Poses without limits  - but now found that there is indeed a reason for this feature being part of the application.

Limits - good point! I haven't really looked much at the rig in this respect. I normally don't use limits when posing, but they are definitely useful and sometimes indispensable when working with IK or any other means of setting up poses (semi-) automatically.

I've gone all professional on myself this weekend and started a to-do list. "Check limits" is now on it.

-- I'm not mad at you, just Westphalian.