Index: openacs-4/packages/general-comments/www/comment-edit.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/general-comments/www/comment-edit.tcl,v
diff -u -r1.5.20.1 -r1.5.20.2
--- openacs-4/packages/general-comments/www/comment-edit.tcl	6 Sep 2013 16:01:49 -0000	1.5.20.1
+++ openacs-4/packages/general-comments/www/comment-edit.tcl	3 Oct 2013 08:41:29 -0000	1.5.20.2
@@ -30,7 +30,7 @@
 
 # if revision_id is not passed in, assume that the user
 # wishes to edit the latest revision
-if { [empty_string_p $revision_id] } {
+if { $revision_id eq "" } {
     set revision_id [db_string get_latest_revision \
             "select content_item.get_latest_revision(:comment_id) from dual"]
 }