Hi Petra, @itemize takes an argument specifying the item marker to use. That always defaults to a bullet in TeX, Info, etc., regardless of nesting. In the nested list, you need to explicitly say @itemize @minus (or whatever marker you want).
Here is the section in the manual that talks about it: http://www.gnu.org/software/texinfo/manual/texinfo/html_node/_0040itemize.html It would certainly be reasonable for default marker to change with each nested list, but the current behavior has been the case since the beginning of Texinfo, so I'm loath to change it now. Best, Karl
