If you visit http://jobmob.co.il/ with a smartphone, more often than not the homepage displays the desktop version. Since upgrading to 3.1.1 (now on 3.1.5), I've only seen the Bauhaus version of my homepage once.
Also, if you click through to one of the articles, sometimes you'll get the Bauhaus version, and sometimes it's the desktop version.
- I have cleared all W3TC caches a few times.
- I have cleared my smartphone (Firefox) browser cache.
- I have configured W3TC to let mobile traffic passthrough (which must be why I can see Bauhaus on many of the posts)
Pretty sure this is an issue I've been seeing for a while, even before the WpTouch 3.x upgrades.