OK, somehow got it going again. I network activated Commons in a Box plugin, which brought up the theme engine page, went through some of the CBOX initialization (i.e. choose which packaged plugins to bring in, and updated the plugin to 1.0.5.1). Then, network deactivated the plugin and theme options now finally all available as before. Thanks folks…

Having same trouble as others with missing theme options, but not sure it is entirely a WP upgrade thing. I first noticed the missing theme options on my CBox WP MU before upgrading to WP 3.6.1. (like Sam, “Start” and “Options” from CBOX theme options fail to launch, but instead open new tab with blank page & zero) I then upgraded to 3.6.1…[Read more]