Index: openacs-4/packages/evaluation/www/admin/evaluations/grades-sheets.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/evaluation/www/admin/evaluations/grades-sheets.tcl,v
diff -u -r1.10 -r1.11
--- openacs-4/packages/evaluation/www/admin/evaluations/grades-sheets.tcl	14 Mar 2008 12:33:59 -0000	1.10
+++ openacs-4/packages/evaluation/www/admin/evaluations/grades-sheets.tcl	27 Oct 2014 16:41:25 -0000	1.11
@@ -10,7 +10,7 @@
 
 } -query {
 	{orderby:optional}
-	task_id:integer,notnull
+	task_id:naturalnum,notnull
 	return_url
 } -validate {
 	grades_sheets {
@@ -61,7 +61,7 @@
 
 set orderby [template::list::orderby_clause -orderby -name grades_sheets]
 
-if {[string equal $orderby ""]} {
+if {$orderby eq ""} {
     set orderby " order by grades_sheet_name asc"
 }