Website: Math rendering on Transform page broken

The page http://eigen.tuxfamily.org/dox/classEigen_1_1Transform.html (and some others I think) do not render math.

In Firefox, I see this:

In Safari, I see this:

Additional Info

I just ran make doc on the current master, and the same problem shows in those pages. I am not sure if this relates to the numerous ghostscript errors I am getting:

Generating image form_78.png for formula
Error: /undefined in getenv
Operand stack:
   (outfile)
Execution stack:
   %interp_exit   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--   --nostringval--   --nostringval--   false   1   %stopped_push   1974   1   4   %oparray_pop   1973   1   4   %oparray_pop   1961   1   4   %oparray_pop   1817   1   4   %oparray_pop   --nostringval--   %errorexec_pop   .runexec2   --nostringval--   --nostringval--   --nostringval--   2   %stopped_push   --nostringval--