original thread
https://sourceforge.net/tracker/?func=detail&aid=3344647&group_id=152762&atid=785191

We have a Grid that has a ListModelExt attached. We have implemented/overridden the method: sort(Comparator c, boolean ascending)
The columns of our grid has custom Ascending and Descending comparators.

When a user clicks on a column (not using the column-context menu) everything works fine.
The first click calls sort(ASC_comparator, true),
and the next calls sort(DESC_comparator, false), and so on

However, if the user uses the column context-menu and chooses "Sort Descending", the call to the ListModelExt receives the Ascending sort comparator, instead of the Descending one.

I discovered that this only happens if the column's sort-direction is "natural". If the column sort-direction has been explicitly set to "ascending" (even though not ever sorted), then it passes in the Descending Comparator