>And this is funny... I've switched to a CREATEd cursor, and it works now, except that the grid seems blank until I open another window. Seems to need an extra refresh - yep, that works.
>
>So it was probably that "select * ... where .f. ... readwrite" wasn't really respecting the implied NOFILTER, and the cursor behaved pretty much like a view. Very interesting.

Now I switched back to

select * ... where .f. ... readwrite NOFILTER

and it works... which means not all cursors are created equal.