Easy to fix.
% engine=luatex
\def\dodoattributedcopy {\startinheritattributes\ifvbox\attributeboxcount\vbox\else\hbox\fi {\ifvbox\attributeboxcount\unvcopy\else\unhcopy\fi\attributeboxcount}% \stopinheritattributes}
\def\dodoattributedbox {\startinheritattributes\ifvbox\attributeboxcount\vbox\else\hbox\fi {\ifvbox\attributeboxcount\unvbox\else\unhbox\fi\attributeboxcount}% \stopinheritattributes}
\starttext
\enableattributeinheritance
\setbox\scratchbox\vbox{foo} \attributedbox\scratchbox
\stoptext
Wolfgang
Compilation ok with last mkiv This is LuaTeX, Version snapshot-0.20.2-2007121721 (Web2C 7.5.6) ConTeXt ver: 2007.12.29 22:30 MKIV fmt: 2007.12.30 int: english/english -- luigi http://wiki.contextgarden.net/User:Luigi.scarso/Merry_Christmas_2007 .... it's new . it's powerful . it's luatex . http://www.luatex.org