JFTR: The upload of grml-etc version 1.1.4 is supposed to really fix the issue. 
Explanation: it failed due to a stupid mistake - being a check for nfsdir 
instead of the currently being used nfsroot option. Thanks for all the testing, 
Wolfgang! Hopefully this package really fixes the issue now. :)

Jimmy, any chance that you can test a fresh ISO from daily.grml.org in the next 
few days?

thx && regards,
-mika-