[#1464 Can not display issuetracker with Zope-2.12.2 and non-ascii issue_categories]

I was installing Zwiki2.0b1 with Zope-2.12.2 and import 
my own zwiki site.I almost have not any problems.

Today, I tried to view my issuetracker and that pages.
My zwiki shows blank page without any error messages.

I thought probably ir is one of non-ascii characters issues
on ZWiki-2.12.2. Then I remove all non-ascii characters 
catrvoriesin the issue_categories property to find what it do.
My zwiki shows the issuetracker and all issue pages complately.



Server:

 :CPU:    *Pentium4 2GHz* (single core, non multi thread)
 :Memory: *2G*
 :OS:     *!CentOS5.4/i386*
 :Python: *2.6.4*
 :Zope:   *2.12.2 (<- 2.12.1)*
 :Zwiki:  *2.0b1*

Zope setup:

 :locale　　　　　　　　:             *ja_JP.UTF-8*  in my zope.conf
 :datetime-format:             *international*
 :rest-input-encoding:         *utf-8*
 :rest-output-encoding:        *utf-8*
 :rest-language-code:          *ja*
 :default-zpublisher-encoding: *utf-8*
 :management_page_charset:     *utf-8* on my ZMI's root folder property tag

Zwiki usage:

 :language: *japanese*

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forwarded from http://zwiki.org/1464CanNotDisplayIssuetrackerWithZope2122AndNonAsciiIssueCategories#[email protected]