Make it work in a cck Multigroup

I am using the module with CCK 6.x-3.0-alpha3, because it has the option to arrange fields in multigroups, so that you could have for e.g. multiple Datefields and add descriptive textfields to each of them. Right now it seems that the module is not working with CCK multigroups. It would be a neat extension. Please also have a look at the attached screenshot, showing a date field (with "Date single day" switched on, but not working) and a text field arranged in a cck multigroup.