Don McGregor:
Where are user-created themes kept, and how should I be upgrading them?
When you create a theme plugin, it deploys as a separate war. So in your webapps directory, you probably had at one point a "xx_theme" plugin deployed. When that theme was available, it was assigned to a page in the portal, but then later the theme was removed w/o updating the corresponding page(s).
(Notice that the theme name has an underscore in it, and there's a directory under work with only an underscore in it. Could there have been a glitch in the upgrade code involving underscores in theme names?)
I doubt it. More likely the original theme project itself was named "xx_theme".
For the error, Liferay's reporting that you have pages that are using a theme that is not available. So you have two choices; you can dig up the xx_theme project and update it for 6.2 and deploy it back to your portal, or you can go into the pages you have and select another theme for them.
