Random homeomorphisms and Fourier expansions - the pointwise behavior
  Let phi be a Dubins-Freedman random homeomorphism on [0,1] derived from the base measure uniform on the vertical line x=1/2, and let f be a periodic function satisfying that   |f(x)-f(0)| = o(1/log log log 1/x).   Then the Fourier expansion of f composed with phi converges at 0 with probability 1. In the condition on f, o cannot be replaced by O.   Also we deduce some 0-1 laws for this kind of problems. 
Gady Kozma