Am 05.08.2012 um 09:39 schrieb Wolfgang Schuster <wolfgang.schuster@gmail.com>:

> \setuppagenumbering[alternative=doublesided]
> 
> % You can use this instead of \setuppagenumbering[numberconversion=romannumerals]
> % to set the conversion of the pagenumber outside of the sectionblock environment,
> % the first argument takes the name of the conversion which is applied to the
> % userpage counter with \setupcounter[userpage][numberconversionset=pagenumber].
> %
> % You can set a conversion for a certain sectionblock when you write the name
> % of the block before the name of the conversion set separated by a “:”.
> %
> %\defineconversionset[frontpart:pagenumber][][romannumerals]
> 
> \startsectionblockenvironment[frontpart]
> 
> \setuppagenumbering[numberconversion=romannumerals]


This has to be (wrong command for the conversion and missing style for the numbers):

\setuppagenumbering [style=italic]
\setupuserpagenumber[numberconversion=romannumerals] % you can also use \setuppagenumber which is a synonym for \setupuserpagenumber

Wolfgang