Plugin conflicted with theme - NonNom child theme (skin) of 2011 WP theme.
removed sidebars and widgets, messed up layout of sidebar, full width and other page layouts.
Had to completely remove the plugin to fix the layout. Deactivating plugin didn't work (site not cached at time)
Will also try with some otheer sites and let you know.
Excellent plugin concept though, will definitley be trying the next release on that site and others.