by Olumuyiwa Taiwo.
I've also voted to have this issue fixed.
It caused complications with a block I was developing - to list all assignment submissions across the site that a teacher is able to grade, listed in a table, with a link on each one for the teacher clicks on and be taken to the correct assignment.
Richard's suggestion to use the 'userid' parameter will make that link easy to generate whereas the 'rownum' parameter is fraught with danger, as Richard has pointed out.