I did two launch of the same script except path to output pdf file.
First launch was on: Linux ubuntu 2.6.38-11-generic #50-Ubuntu SMP Mon Sep 12 21:18:14 UTC 2011 i686 i686 i386 GNU/Linux
Results shown on left white screen.
Second launch was on: Linux ubuntu 2.6.32-28-generic #55-Ubuntu SMP Mon Jan 10 23:42:43 UTC 2011 x86_64 GNU/Linux
(it is ubuntu server)
Results shown on right black screen.
Firts one makes PDF file, but Second not makes PDF.
What can be wrong with it?
And on ubuntu server (black screen) in first string I can see message
"Fontconfig error: Cannot load default config file"
Here is comparing: