Yes, it has been running reliable for more than a week. I'll let you know, if it happens again.

Arraysync is running on 4 Mac mini (Mac OSX 10.6) here. An Automator script starts server and clients at 11AM and the Energy Saver Schedule shuts down the 4 Macs every night at 11PM. The other morning the server was still running and showing the error message:

"An exception of Nilobjectexception ...