Hi Kevin, I had the same problem and solved it like so: go to the module: Zope_2_6\lib\python\ZPublisher\HTTPResponse.py search for 'APPEND_TRACEBACKS = 0' and change it to '1' as the comment says. There is a way to improve it further. You can get even the relevant bit of the source-code in the concerned module by a nice extension written by Anatoly Artamonov and called trace_bk.py. I am very happy with this and it helps a lot of understanding the course of errors. now I have my old 2.5. error-messages plus a bit more ;-). You can even add <strong>Error error_tb: <dtml-var error_tb></strong><br> to your standart_error_message to get even more information. For that you have to change def _traceback in HTTPResponse.py like so: def _traceback(self, t, v, tb, as_html=1): #### Start 2 lines added for trace_bk from Shared.trace_bk import new_tb return new_tb(t,v,tb, self.debug_mode) #### End: 2 lines added for trace_bk tb = format_exception(t, v, tb, as_html=as_html) return '\n'.join(tb) -- hope you'll love it like me, Elena