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 Products.CMFQuickInstallerTool.QuickInstallerTool, line 575, in installProducts
  Module Products.CMFQuickInstallerTool.QuickInstallerTool, line 512, in installProduct
   - __traceback_info__: ('my.skin',)
  Module Products.GenericSetup.tool, line 323, in runAllImportStepsFromProfile
   - __traceback_info__: profile-my.skin:default
  Module Products.GenericSetup.tool, line 1080, in _runImportStepsFromContext
  Module Products.GenericSetup.tool, line 994, in _doRunImportStep
   - __traceback_info__: plone.app.theming
  Module plone.app.theming.exportimport.handler, line 40, in importTheme
  Module plone.app.theming.utils, line 427, in applyTheme
  Module plone.registry.recordsproxy, line 43, in __setattr__
AttributeError: currentTheme

This will probably have nothing to do with a wrong setup in your theme, but simply a dependency issue to diazo. Just make sure you install “Diazo theme support” before your theme is installed.

Reference: http://plone.293351.n2.nabble.com/plone-app-theming-1-0b5-and-Plone-4-1rc2-Plone-4106-td6418670.html