I have been using texexec which, as I understand it, is mkii. I have several documents that have unicode in them and typeset perfectly using texexec. However, texexec seems to have trouble with metapost and I would like to use mkiv. However, when I use context only a handful of the unicode characters actually typeset, namely the capital greek characters.
Any ideas why? How can I fix this?
Example In the following, the alpha typesets using texexec but not context.
\starttext
α
\stoptext