startx hanging - startup problem located

[martouf .]

I started by using Windows Task Manager to try to find the 'hanging'
problem, and after sorting the process list by CPU usage - there was
'cat' spinning away.  Process Explorer v9.02 provided the same data. 
Trying to 'cat /proc/PIDNO/cmdline' would only provide "<defunct>".

It does not matter if I use 'rootless' or 'multiwindow' - X stops at
the "Rules" line (although I often see a clipboard connection
message).