In the recent days, MathJax often stops working. This means that, when I view questions with Math formulas (e.g. Consumer optimum in an economy with a continuum of commodities), I see dollar-signs instead of math formulas, e.g:
$$U = \int_0^1 c_i^\theta\,di\qquad 0<\theta<1$$
This happens both in Firefox (40) and Chromium (44), both on Ubuntu 14.04.
Is it only me?