Avoid SMA in Desktop Browser

Since I’ve been upgrading to 1.8, Juiz SMA is also showing me the mobile backend when I’m using my desktop/notebook browser (Mac OS 10.8.2, Chrome 24.0.1312.40 beta and Safari 6.0.2). This problem shows up on several machines, with several WP installations (all on WP 3.5). Everything worked fine with the 3.5/1.7 combination.

Any hints?

http://wordpress.org/extend/plugins/juiz-smart-mobile-admin/