--- loncom/interface/lonhtmlcommon.pm	2010/06/09 16:17:00	1.276
+++ loncom/interface/lonhtmlcommon.pm	2010/06/10 09:09:59	1.277
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.276 2010/06/09 16:17:00 bisitz Exp $
+# $Id: lonhtmlcommon.pm,v 1.277 2010/06/10 09:09:59 bisitz Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1052,7 +1052,7 @@ sub Update_PrgWin {
 # increment progress state
 sub Increment_PrgWin {
     my ($r,$prog_state,$extraInfo,$step)=@_;
-    if ($step !~ /^\d+$/) {
+    if ( ($step == 0) || ($step !~ /^\d+(\.\d+)*$/) ) {
         $step = 1; # default
     }
     $$prog_state{'done'} += $step;