screen ant

[Holger Schurig]

> If not, does anyone have the faintest idea of what I might need to
> examine to debug this? I simply have no idea what could be causing this
> or where to start looking.

I'd "apt-get strace" and then run your program in both environments under 
the auspiece of strace. Then compare the result, e.g. do something like 
this:

  $ strace -ooutput -efile -ff <command>
  $ grep open output*

on both systems and find out if it was unable to open some file.