Last modified: 2014-02-08 16:46:22 UTC
In some cases the diagonal line in the letter z does not appear when z is an exponent. For example: http://en.wikipedia.org/wiki/Gamma_function (second formula).
Test cases: <math>\frac{3}{1} 2^z</math> <math>\frac{3}{1} 2_z</math> (the \frac is to prevent simple html rendering and force png rendering) Note, I could not reproduce this on local install (but could on wikipedia) so probably some sort of config issue.
Note that in some cases the line does appear: <math> \!\, f(z) = e^z = e^{(x+iy)} = e^x e^{iy} = e^x \left( \cos{y} + i \sin{y} \right)</math>
Seems to be the difference between rendering with dvipng and rendering with dvips + gs + convert. Running a local 1.17wmf1 the fallback to dvips doesn't seem to work (while it does work on trunk w/ Math extension enabled -- and renders nice-looking small "z"s). Installing dvipng and rerendering, I get the same output we see on the live site, where the top and bottom of the "z" look kinda like little "~"s with no diagonal line.
seems to work now