The following does not seem to work with the latest MKIV version:

\startcomponent

\startitemize
\item A
\item B
\item C
\stopitemize

\stopcomponent

The log file shows:
! Use of \strc_itemgroups_item_alone doesn't match its definition.

system          > tex > error on line 5 in file SimpleTest.tex: Use of  ...

 1     \startcomponent
 2
 3     \startitemize
 4     \item A
 5 >>  \item B
 6     \item C
 7     \stopitemize
 8
 9     \stopcomponent
10
11

l.5 \item B

There is no problem if one uses \starttext…\stoptext (MKIV) or
\startcomponent…\stopcomponent  (MKII).

Is this a bug or have I missed some crucial change in MKIV enumerations?

Alan