Index: openacs-4/packages/acs-tcl/tcl/security-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-tcl/tcl/security-procs.tcl,v
diff -u -N -r1.69 -r1.70
--- openacs-4/packages/acs-tcl/tcl/security-procs.tcl	18 Apr 2011 17:48:43 -0000	1.69
+++ openacs-4/packages/acs-tcl/tcl/security-procs.tcl	18 Apr 2011 20:57:43 -0000	1.70
@@ -98,7 +98,7 @@
 	# The session cookie already exists and is valid.
 	set cookie_data [split [lindex $cookie_list 0] {,}]
 	set session_expr [expr {[lindex $cookie_data 3] + [sec_session_timeout]}]
-    if {![string is integer $session_expr] || $session_expr < [ns_time]} {
+    if {![string is integer -strict $session_expr] || $session_expr < [ns_time]} {
         sec_login_handler
     }
 	set session_id [lindex $cookie_data 0]