Forum OpenACS Development: Category Widget Form Display Inconsistency

I have a category tree mapped to an xowiki instance. I have populated the category tree with items which run to three levels of hierarchy. I have an xowiki form that is set to present the category selector on the formpage entry form so that the entered formpoge can be assigned to a category.

At the top level and first level of the category hierarchy, the categories are displayed in the select box correctly, indented by two point characters like this:

Root
..Item1
..Item2
..Item3

However, at the next level the '..Itemx' is indented further using '  ' which is being displayed in the selector box literally, rather than being rendered:

Root
..Item1
..Item2
..Item3
  ..Item3-1
  ..Item3-2

I guess this may be a matter of setting the selector widget to display its content as html, but I am not clear how this would be done. Alternatively, perhaps the use of html   in the Categories code is not the right answer. I am happy to make whatever changes are needed myself and submit, but I could do with a steer as to where the action is buried! 😊

Regards
Richard