Update to bug 3785. The long fontpath we now includes is not enough for RHEL5. I had to add these dirs on eudemo to get Paraview working:
fontpath = /usr/share/X11/fonts/misc,/usr/share/X11/fonts/75dpi,/usr/share/X11/fonts/100dpi,/usr/share/X11/fonts/Type1,/usr/share/X11/fonts/TTF,/usr/shar\
Fixed in commits r25436, r25437 and r25438
Additional font paths are present in build script, configuration file and configuration default.
It's incredibly non-SPOT, but I'm not going to argue that this is a regression.