diff -Nur moin-1.5.3/MoinMoin/failure.py moin-1.5.3.new/MoinMoin/failure.py
--- moin-1.5.3/MoinMoin/failure.py	2007-02-15 13:19:26.000000000 -0800
+++ moin-1.5.3.new/MoinMoin/failure.py	2007-02-15 13:20:32.858678951 -0800
@@ -139,7 +139,8 @@
     try:
         debug = ('debug' in getattr(request, 'form', {}) or
                  'MOIN_DEBUG' in os.environ)
-        handler = cgitb.Hook(file=request, viewClass=View, debug=debug)
+        handler = cgitb.Hook(file=request, display=request.cfg.show_traceback,
+                             viewClass=View, debug=debug)
         handler.handle()
     except:
         request.write('<pre>\n')
diff -Nur moin-1.5.3/MoinMoin/multiconfig.py moin-1.5.3.new/MoinMoin/multiconfig.py
--- moin-1.5.3/MoinMoin/multiconfig.py	2006-04-07 11:22:01.000000000 -0700
+++ moin-1.5.3.new/MoinMoin/multiconfig.py	2007-02-15 13:19:40.495959471 -0800
@@ -324,6 +324,7 @@
     show_section_numbers = 0
     show_timings = 0
     show_version = 0
+    show_traceback = 1
     siteid = 'default'
     stylesheets = [] # list of tuples (media, csshref) to insert after theme css, before user css
     superuser = [] # list of unicode user names that have super powers :)
diff -Nur moin-1.5.3/wiki/underlay/pages/HelpOnConfiguration/revisions/00000001 moin-1.5.3.new/wiki/underlay/pages/HelpOnConfiguration/revisions/00000001
--- moin-1.5.3/wiki/underlay/pages/HelpOnConfiguration/revisions/00000001	2006-04-15 12:49:50.000000000 -0700
+++ moin-1.5.3.new/wiki/underlay/pages/HelpOnConfiguration/revisions/00000001	2007-02-15 13:19:40.495959471 -0800
@@ -235,6 +235,7 @@
 || show_section_numbers || 0 || True to show section numbers in headings by default ||
 || show_timings || 0 || Shows some timing values at bottom of page - used for development ||
 || show_version || 0 || Show MoinMoin's version at the bottom of each page ||
+|| show_traceback || 1 || Show Python tracebacks if MoinMoin encounters exceptions ||
 || sitename || u'Untitled Wiki' || Short description of your wiki site, displayed below the logo on each page, and used in RSS documents as the channel title [Unicode] ||
 || stylesheets || [] || List of tuples (media, csshref) to insert after theme css, before user css ||
 || superuser || [] || List of trusted user names with wiki system administration super powers (not to be confused with ACL admin rights!). Used for e.g. making full backups, software installation, language installation via SystemPagesSetup and more. See also HelpOnPackageInstaller.||