Sorry for the spam on the updates :) - but, its the same thread printing
this out too. I changed the print line to:

curThread = threading.current_thread()
print("Started subproc: PID: %d : args: %s Thread ID: %s" %(newJob.pid,
str(args), str(curThread.ident)))

and got the output:

Reaping PID: 23707
True
Started subproc: PID: 23709 : args: data1 Thread ID: 12
Started subproc: PID: 23709 : args: data1 Thread ID: 12
poll
isalive: True
Started subproc: PID: 23710 : args: data2 Thread ID: 13
poll
isalive: True

Again, I can't see how this could pring it out twice? Could this be
related to the problem we are having? Altgough I do seem to get the line
twice on 2.6.3 as well - but nothing like as often..