Still, users often had trouble getting to mobile sites, even when companies offered them. The best approach is to auto-sense users' devices and auto-forward mobile users to the mobile site (even if they're using a high-end phone). You should also offer clear links from the desktop site to the mobile site, as well as a link back to the full site. As for link labels, we recommend "Mobile Site" and "Full Site," respectively.

#506600 by cyberknat: attempt in fixing problem with changing back themes for desktop users, when the theme switch option is selected

added solution for caching problem. Mobile sites are never cached. When a mobile site is beeing fetched, the cache is cleared.
This can cause some performance issues... Solution would be to work with a multi-site installation?

#470926 reported by surge_martin: fixed caching problems. Initialization happens in hook_boot now, instead of hook_init()

#449536: removed dev left overs. Added a check if mobile and desktop url are the same => no redirect