Is everyone sure that they didn't have the "first visit via mobile is desktop" set in wp super cache settings ?
This allows wptouch to put a slider at the bottom of each page to let visitors turn the mobile site on when they want.
I have had to turn wptouch off as it has a redirect loop error on the home page, but no any other page.
For me caching is more important that the mobile site, but really I'd like both to work properly.
Oh I long for both mobile and caching to be built into wordpress directly !