IPython (Jupyter) notebook producing ghost line in all equations

Question

I installed IPython / Jupyter using pip on a new machine (Macbook Air with El Capitan). In a fairly simple notebook of mine (created with the same version of the whole stack

Answer 1

This is a change in Chrome, affecting MathJax 2.5, which ships with Jupyter Notebook 4.1. Notebook 4.2 will bundle MathJax 2.6, which will fix this problem. In the meantime, you can tell the notebook to use latest MathJax from the CDN, by adding to ~/.jupyter/jupyter_notebook_config.py:

c.NotebookApp.mathjax_url = "https://cdn.mathjax.org/mathjax/latest/MathJax.js"

Other browsers do not appear to be affected.