Index: openacs-4/packages/acs-templating/tcl/util-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-templating/tcl/util-procs.tcl,v
diff -u -r1.26.2.2 -r1.26.2.3
--- openacs-4/packages/acs-templating/tcl/util-procs.tcl	13 Sep 2013 13:20:53 -0000	1.26.2.2
+++ openacs-4/packages/acs-templating/tcl/util-procs.tcl	13 Sep 2013 13:32:10 -0000	1.26.2.3
@@ -134,7 +134,7 @@
     @return 0 if the variable can be interpreted as false; 
             1 for true if it can't.
 } {
-  expr {[string tolower $x] in {0 f false n no off ""}}
+    expr {[string tolower $x] ni {0 f false n no off ""}}
 }
 
 ad_proc -public template::util::lpop { ref } {