[Setup] URGENT: can't change 'Unthemed host names' per /@@theming-controlpanel

[Hydrostarr2]

URGENT: can't change 'Unthemed host names' per /@@theming-controlpanel.  
Client logs for a couple attempts follows at end of this email.  This 
happens whenever clicking "Save" button anywhere within 
/@@theming-controlpanel , *regardless* of any field change.  This 
happens on two separate Plone4.1 servers we're running.  One's on Ubuntu 
10.04, the other on Ubuntu 11.04 (not that the OS levels necessarily 
matter).

Stumped here.  Not even sure where to begin.  Googling similar errors 
hasn't produced any answers yet.

Need to solve this soon, because we're remapping host/DNS names in our 
network config... and need to get to the admin/unthemed interface...and 
therefore need to set the admin interface here because this problem 
<http://plone.293351.n2.nabble.com/4-1b2-http-requests-to-non-themed-site-works-for-one-theme-but-not-the-other-td6811072.html> 
was never solved (much to our chagrin), and we set the "admin.*" 
hostname in the 'Unthemed host names' to get things to work (otherwise 
can't get to the admin interface, in the past at least, for at least one 
of our themes/sites).

Any urgent help would be -greatly- appreciated...


2011-10-06T18:27:08 ERROR Zope.SiteErrorLog 1317940028.190.0485562150281 
http://admin.mysite.com/@@theming-controlpanel
Traceback (innermost last):
   Module ZPublisher.Publish, line 126, in publish
   Module ZPublisher.mapply, line 77, in mapply
   Module ZPublisher.Publish, line 46, in call_object
   Module plone.app.theming.browser.controlpanel, line 35, in __call__
   Module plone.app.theming.browser.controlpanel, line 106, in update
   Module plone.registry.recordsproxy, line 43, in __setattr__
AttributeError: doctype
------
2011-10-06T18:28:58 ERROR Zope.SiteErrorLog 1317940138.310.0684648348982 
http://admin.mysite.com/@@theming-controlpanel
Traceback (innermost last):
   Module ZPublisher.Publish, line 126, in publish
   Module ZPublisher.mapply, line 77, in mapply
   Module ZPublisher.Publish, line 46, in call_object
   Module plone.app.theming.browser.controlpanel, line 35, in __call__
   Module plone.app.theming.browser.controlpanel, line 106, in update
   Module plone.registry.recordsproxy, line 43, in __setattr__
AttributeError: doctype


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