The math extension seems to be unable to render anything at Wikisource: If you go to any page on the Czech Wikisource, write e.g. <math>x</math> and show preview, you'll get the "Missing texvc executable" error.

I tried the same at enwikisource and if I try something more difficult than <math>x</math> (which is probably cached), the same error appears (and both seem to be running 1.22wmf5).

Version: wmf-deployment
Severity: major
URL: http://cs.wikisource.org/wiki/Wikizdroje:U_pramene#Matematika
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=45076
https://bugzilla.wikimedia.org/show_bug.cgi?id=49442