I have the following problem with the plugin:
It switches correctly to the mobile theme on my iPhone but the mobile theme uses a plugin from the desktop theme that is not installed in the mobile theme. This plugin seems to "bleed" into the mobile theme (it is the "WP Supersized" plugin, http://wordpress.org/plugins/wp-supersized). When I deactivate the plugin in the main/desktop theme it is also deactivated in the mobile theme.
Second problem: a CSS class that I defined in the mobile theme (regarding a menu-text orientation) seems to be overwritten by the mobile-smart plugin in. The text orientation changes although it was correct in the mobile theme. Again here seems to be something "bleeding" over to the mobile theme.
I am using two custom themes, one based on the "Twenty Twelve" and the other on the "_s/underscore"-theme.
Can anybody help with these two things?