Hi Aditya, Hi Hans, It seems that recently the align environment in mkiv has changed and I get several strange results now. The (not so minimal…) example below results in the folowing two PDFs: http://dl.dropbox.com/u/4316076/align-mkii.pdf http://dl.dropbox.com/u/4316076/align-mkiv.pdf As far as I can say the right behaviour is the one in mkii. Is there a way to get the same result in mkiv by changing some parameters? (I have movede litlle by little to maths in mkiv and I would like to fix somehow the apparently incorrect behaviour of mkiv…). Best regards: OK PS: Here is the source file: %%% align-mkiv.tex % defining an alignment structure \definemathmatrix[alignedcases] [align={right,left,left}, distance=3pt, left={\left\{\;}, right={\right.}, style=\displaystyle] \starttext \startformula \startalignedcases \NC -\partial_t \Delta \psi + \Delta^2 \psi - \Delta \psi \NC = 0 \NC \quad \mbox{in }\, (0,\infty)\times \Omega \NR \NC \psi (0,x) \NC= \psi_0(x) \NC \quad \mbox{in }\, \Omega \NR \NC \psi (t,\sigma ) \NC= 0 \NC \quad \mbox{on }\, (0,\infty)\times \partial\Omega \NR \NC {\partial \psi \over \partial {\bf n}}(t,\sigma ) \NC = 0 \NC \quad \mbox{on }\, (0,\infty)\times \partial\Omega. \stopalignedcases \stopformula \stoptext %%% end align-mkiv.tex