Hi there!

After a new installation of Texlife my radio field example (4.10.) works 
(now?).
But if you simply add
  \mainlanguage[de]
the first button is indented again. Hmmm...., it seems that my first example
was too minimal. I've also tried [en] and [dk]; no problems.

I have attached the tex-source and the resulting files (pdf,log).

Greetings,

  Peter