[NTG-context] MKIV math: arrow symbols undefined

Dear all, I've noticed that "\leadsto", "\rightsquigarrow" and "\leftrightsquigarrow" are not defined in MKIV (ConTeXt ver: 2012.12.06 18:39 MKIV). However, they appear in MKII (ConTeXt ver: 2012.12.06 18:39 MKII). I've tested the entire set at http://www.access2science.com/latex/Arrows.html Cheers, Andreas %%% MINIMAL EXAMPLE %%% \starttext leadsto: $\leadsto$ squidarrow: $\leftrightsquigarrow$ squidarrow: $\rightsquigarrow$ \stoptext %%% MINIMAL EXAMPLE %%%