[Bug-xnee] xnee works with manual start, but does not work when autostarts at boot

[Clayton]

Hi,

I have a cloud server running xvfb that I am using as a test driver. On
it, I have a script that launches a piece of software, and then
launches xnee to perform some actions on this software (via a
pre-made xnee recording).

This works if I start the server and launch the script manually, ie.
I can see the xnee recording replaying on the software.

However, if I set the script to be launched automatically on boot
(Ubuntu, using upstart) the script seems to work, starting both the
software under test and xnee. But, xnee does not seem to be talking to
the software under test, the recording does not seem to play on the
software. No obvious error in the xnee log (output of --err-file) 
either.

Both software and xnee are supposed to be talking to the same X
DISPLAY :99.0.

Any hints on where to go from here?

Thanks,
Clayton