[NTG-context] index entries inside footnotes

Hi all, for the book project I'm typesetting, I need two indexes. I discovered that there is a slight problem with index entries in footnotes in mkiv. Here's a minimal example: \starttext Cats\index{cats} \index{cats}and \footnote[1]{dogs\index{dogs} and} more \index{dogs}dogs. \placeregister[index] \stoptext This gives the expected result in mkii; in mkiv, a spurious comma is added in front of the entry "dogs," which occurs inside a footnote. (btw, ideally I would like the index to have "1 n. 1" - can this be achieved?) All best Thomas