Real Issue Tracker

I'm new to Issue Tracker (and Zope in general) so please excuse me if there is an obvious answer to this. I just installed an Issue Tracker and whenever I try to add an issue I get a TypeError (see below). I've been ignoring it, since when I "list issues" or "Complete list" they appear there. But now I've discovered that when I click on the issue that I get the same type error and hence am unable to do anything with the issue (follow up, etc). I made only minor modifications to the default set up (changed some section names).

Thanks in advance,
Eric


--------------------------------------------------
Error type: TypeError
Error value: character mapping must return integer, None or unicode

Traceback (innermost last):
Module ZPublisher.Publish, line 119, in publish
Module ZPublisher.mapply, line 88, in mapply
Module ZPublisher.Publish, line 42, in call_object
Module Products.IssueTrackerProduct.Issue, line 609, in index_html
Module Shared.DC.Scripts.Bindings, line 313, in __call__
Module Shared.DC.Scripts.Bindings, line 350, in _bindAndExec
Module Products.CheckoutableTemplates.CTFiles, line 214, in _exec
Module Products.CheckoutableTemplates.slimmer, line 58, in slimmer
Module Products.CheckoutableTemplates.slimmer, line 107, in _xhtml_slimmer
Module Products.CheckoutableTemplates.slimmer, line 113, in _html_slimmer
Module Products.CheckoutableTemplates.slimmer, line 156, in css_slimmer
Module Products.CheckoutableTemplates.slimmer, line 83, in _css_slimmer
Module Products.CheckoutableTemplates.slimmer, line 186, in simplifyHexColours
Module Products.CheckoutableTemplates.slimmer, line 246, in __call__
TypeError: character mapping must return integer, None or unicode