Cannot refresh Omega sub-theme settings from .info file

http://groups.drupal.org/node/211638

Running into a problem trying to flush settings in the DB for an Omega (3.x) sub-theme and refresh them from the .info file. Omega Tools puts several buttons at the bottom of the theme settings form and my understanding is that the "Refresh theme settings" button is meant to do exactly what I want - i.e. clicking that button results in the message "The theme settings for (sub-theme-name) have been purged from the database and are now being loaded from the .info file of this theme." Problem is, nothing changes in the theme. I went as far as tracking down the 'theme_save_settings' BLOB in the core 'variables' table and can see that variable deleted after using the "Refresh" button but, again, no visual changes in the theme. I can also confirm that the settings are being stored someplace other than the 'variables' table by using the "Export theme settings" button and seeing the pre-Refresh values still there. I've tried a number of cache-clearing solutions to rule that out - Performance/clear, Devel-module/clear, MySQL DB flush, but still nothing.