#2 — AttributeError when trying to uninstall a theme on Plone 2.5

I created a new theme using the bin/generator.py script with the latest DIYPloneStyle from svn trunk, and successfully installed the new theme in my Plone site. However, when I try to uninstall the theme, the following error occurs. I'm using Plone 2.5 final release.

Traceback (innermost last):
  Module ZPublisher.Publish, line 115, in publish
  Module ZPublisher.mapply, line 88, in mapply
  Module ZPublisher.Publish, line 41, in call_object
  Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 527, in reinstallProducts
  Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 510, in uninstallProducts
  Module Products.CMFQuickInstallerTool.InstalledProduct, line 278, in uninstall
  Module Products.ExternalMethod.ExternalMethod, line 225, in __call__
   - __traceback_info__: ((<PloneSite at /sites/oblates>,), {}, None)
  Module /usr/misc/zope/instances/zope29-plone25-staging/Products/OblatesTheme/Extensions/Install.py, line 22, in uninstall
  Module Products.OblatesTheme.Extensions.utils, line 131, in resetResources
AttributeError: _data