In response to the first command:

3.3.1 (v3.3.1:d9893d13c628, Apr  6 2013, 11:07:11) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)]

…and the second command:

Warning: unable to create user config directory
/Users/ben/.idlerc
 Check path and permissions.
 Exiting!

I've checked console and activity monitor and cannot see any further reference to IDLE. The message I sent previously was the only one shown in 'All Messages' after a marker I added to know where to start from. 

I downloaded Python 3.31 from the official site and selected the 64bit version. I ran the ActiveTCL 8.5.13 download first. 

Thanks,

Ben

On 28 Apr 2013, at 21:59, Ned Deily <report@bugs.python.org> wrote:

> 
> Ned Deily added the comment:
> 
> OK, assuming you are using a default install of Python 3.3.1, try opening a terminal window (Terminal.app) and launching IDLE from there by typing:
> 
> /usr/local/bin/python3.3 -c 'import sys;print(sys.version)'
> /usr/local/bin/python3.3 -m idlelib
> 
> and report what messages you see there.
> 
> Also, are there any other messages with "com.apple.launchd.peruser" or "org.python.IDLE" immediately before that one?  You can use Console.app to see if there are any relevant crash reports under User Diagnostic Reports.  You could use Activity Monitor.app to see if there is already an IDLE or Python process running.  If you can, try logging -out and -in and/or rebooting.  And which Python 3.3.1 did you install: from the python.org 3.3.1 64-bit/32-bit installer, from the python.org 3.3.1 32-bit-only installer, or from somewhere else?
> 
> ----------
> 
> _______________________________________
> Python tracker <report@bugs.python.org>
> <http://bugs.python.org/issue17864>
> _______________________________________