[Zope] anyone seen these errors with Zope 2.11.1?

[Chris Withers]

Hi All,

I recently ugpraded to Zope 2.11.1 and now get the following errors 
every so often:

   Module Products.PageTemplates.ZopePageTemplate, line 330, in _exec
   Module Products.PageTemplates.ZopePageTemplate, line 427, in pt_render
   Module Products.PageTemplates.PageTemplate, line 96, in pt_render
   Module zope.pagetemplate.pagetemplate, line 115, in pt_render
    - Warning: Macro expansion failed
    - Warning: zope.tal.taldefs.METALError: macro nesting limit (100) 
exceeded by u'template/macros/showbullet'
   Module zope.tal.talinterpreter, line 271, in __call__
   Module zope.tal.talinterpreter, line 346, in interpret
   Module zope.tal.talinterpreter, line 534, in do_optTag_tal
   Module zope.tal.talinterpreter, line 516, in no_tag
   Module zope.tal.talinterpreter, line 346, in interpret
   Module zope.tal.talinterpreter, line 745, in do_insertStructure_tal
   Module Products.PageTemplates.Expressions, line 200, in evaluateStructure
   Module Products.PageTemplates.Expressions, line 232, in _handleText
   Module Products.PageTemplates.unicodeconflictresolver, line 69, in 
resolve
   Module zope.publisher.http, line 931, in getPreferredCharsets
ValueError: too many values to unpack

There appear to be two contradictory errors going on here:

1.
    - Warning: Macro expansion failed
    - Warning: zope.tal.taldefs.METALError: macro nesting limit (100) 
exceeded by u'template/macros/showbullet'

2.
   Module zope.publisher.http, line 931, in getPreferredCharsets
ValueError: too many values to unpack

Has anyone seen either?

cheers,

Chris

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