So what's happening is that it's now loading the theme for that page which has a golden coloured gradient. This was broken before causing pages that hadn't been designed for mobile devices to fail.
At the moment it will load the mobile theme if the user agent for your device is recognized as a mobile webkit browser and the XPage is prefixed with the string "mobile" (eg http://example.com/XPages.nsf/mobileMain.xsp).
This prefix will be configurable in the next release of the extension library.