[NTG-context] "offset" command fails in caption (mk IV)

[zs]

Hello,

could you anybody confirm that following code causes fatal error in mkiv and not in mkii?

I use minimals from 2009/12/17 in linux 64bit.
LuaTeX: beta-0.46.0-2009112619
context: 2009.12.15 23:38


Thanks

Zdenek


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This fails in mkiv. 

\starttext
\placefigure[][]{A\offset[y=-.2ex]{+}B}{}	
\stoptext

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This is OK in both (mkiv & mkii)

\starttext
A\offset[y=-.2ex]{+}B
\stoptext
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