Background first: My client bought the Karma theme and I helped him build the look of his site around its many features. Last week the upgrade to WP 3.5.1 caused it to revert to Twenty Twelve and to display this message:
The following themes are installed but incomplete. Themes must have a stylesheet and a template.
Karma Template is missing.
The site is dhenoble.com.
Consequently, photos are missing, the home page looks bad, and he knows the best long-term option is to create a child theme out of Twenty Twelve so we can style it how we want to.
However, (here comes the question) this is the week after a show and he's getting lots of traffic. Is there any way to either (a) revert temporarily to earlier WP, or (b) figure out what's making Karma look broken and tweak that?
The client's a great guy and I'd like to ease his pain if possible.
Thanks to anybody who's willing to make some constructive suggestions!