Extra vertical space in intertext

[Aditya Mahajan <adityam@umich.edu>]

Hi,
  There is an extra vertical space in the first set of formulas, while 
the vertical spacing in the second set appears to be fine. I can not 
figure out why this should happen. Even if you comment the 
setupformulas line, the first set of formulas seem to allocate more 
space for the intertext.

\setupformulas[align=right,spacebefore=none,spaceafter=none]
% There appears to be extra space, even if I put 
% spacebefore=spaceafter=big
% align = right is for visualization purpose only
\starttext
\startTEXpage
\startformula \startalign
   \NC A \NC B \NR
   \intertext{test}
   \NC C \NC D \NR
\stopalign \stopformula
test outside formula
\startformula \startalign
   \NC A \NC B \NR
   \intertext{test}
   \NC C \NC D \NR
\stopalign \stopformula
\blank[big]
\startformula \startalign
   \NC \int_0^1 \NC B \NR
   \intertext{test}
   \NC \int_0^1 \NC D \NR
\stopalign \stopformula
test outside formula
\startformula \startalign
   \NC \int_0^1 \NC B \NR
   \intertext{test}
   \NC \int_0^1 \NC D \NR
\stopalign \stopformula
\stopTEXpage
\stoptext

And what is happening with the start stop TEX page here. Why is the 
last line cut off!

Thanks,
Aditya