Index: openacs-4/packages/bug-tracker/tcl/bug-tracker-callback-procs.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/bug-tracker/tcl/bug-tracker-callback-procs.tcl,v
diff -u -r1.5 -r1.6
--- openacs-4/packages/bug-tracker/tcl/bug-tracker-callback-procs.tcl	21 Nov 2019 18:57:29 -0000	1.5
+++ openacs-4/packages/bug-tracker/tcl/bug-tracker-callback-procs.tcl	21 Nov 2019 19:01:09 -0000	1.6
@@ -52,7 +52,7 @@
 
         template::util::list_of_lists_to_array $email(bodies) email_body
 
-        if {[exists_and_not_null email_body(text/html)]} {
+        if {[info exists email_body(text/html)] && $email_body(text/html) ne ""} {
             set body [ad_html_to_text -- $email_body(text/html)]
         } else {
             set body $email_body(text/plain)
Index: openacs-4/packages/bug-tracker/www/admin/formwizard.tcl
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/bug-tracker/www/admin/formwizard.tcl,v
diff -u -r1.8 -r1.9
--- openacs-4/packages/bug-tracker/www/admin/formwizard.tcl	21 Nov 2019 18:57:29 -0000	1.8
+++ openacs-4/packages/bug-tracker/www/admin/formwizard.tcl	21 Nov 2019 19:01:09 -0000	1.9
@@ -186,7 +186,7 @@
 }
 
 # If the user hit cancel, ignore everything else
-if { \[exists_and_not_null cancel\] } {
+if { \[info exists cancel\] && \$cancel ne \"\" } {
     ad_returnredirect \$return_url
     return
 }