[Hello all. Just registered to ask this.]

I insatlled python 3.2 from Ubuntu Software Center. 
It created python Icon in launcher as expected. 

It was working fine until i customized the IDLE theme. I edited the 
config-highlight.cfg found in /home/user/.idlerc (hidden) directory. 
I copy pasted desert color theme into this file and pressed save.(I perfectly edited file with leaving one newline at end. So it is not issue with editing i believe.) 

Then i closed the editor. When i tried running by clicking 'IDLE (Using Python 3.2)' in Ubuntu launcher, it glows for a while then nothing shows up. 
I could see a process name python running in system monitor, but no IDLE window.

I tried these issues : 
4049
15998
8099
7265

But all these issues are related to windows OS. 
I tried follwing the similar instruction but i see three directories in /usr/lib/ as python2.7, python3 and python3.2. I am stuck at this point. So i did not choose to proceed. :S

Can you please see into it? Thank you.

Can you please provide your config-highlight.cfg?

Sure, Here it is:

[Rajesh_Python_Settings]
definition-foreground = #86deff
error-foreground = #ff1c1c
normal-foreground = #ffffff
keyword-foreground = #fff900
hilite-foreground = #000000
comment-background = #511633
hit-foreground = #ffffff
builtin-background = #511633
stdout-foreground = #efefef
cursor-foreground = #fffff5
string-background = #511633
break-background = #ffff55
comment-foreground = #997678
hilite-background = gray
definition-background = #511633
stderr-background = #511633
hit-background = #000000
console-foreground = #2cbbff
normal-background = #511633
builtin-foreground = #f4cec6
stdout-background = #511630
console-background = #511644
stderr-foreground = #ff5900
keyword-background = #511633
string-foreground = #00e05b
break-foreground = black
error-background = #311634
cursor-foreground = black

[Obsidian]
definition-foreground = #678CB1
error-foreground = #FF0000
string-background = #293134
keyword-foreground = #93C763
normal-foreground = #E0E2E4
comment-background = #293134
hit-foreground = #E0E2E4
builtin-background = #293134
stdout-foreground = #678CB1
cursor-foreground = #E0E2E4
break-background = #293134
comment-foreground = #66747B
hilite-background = #2F393C
hilite-foreground = #E0E2E4
definition-background = #293134
stderr-background = #293134
hit-background = #000000
console-foreground = #E0E2E4
normal-background = #293134
builtin-foreground = #E0E2E4
stdout-background = #293134
console-background = #293134
stderr-foreground = #FB0000
keyword-background = #293134
string-foreground = #EC7600
break-foreground = #E0E2E4
error-background = #293134

The erlier one is my own custom setting, i edited it on idle and saved as custom theme. Also to mention later one theme added via text editor from this site: ramdump(dot)com/2011/08/04/obsidian-theme-for-idle/. 
Thanks.

Run IDLE from command line and you will see:

configparser.DuplicateOptionError: While reading from .../.idlerc/config-highlight.cfg [line 29]: option 'cursor-foreground' in section 'Rajesh_Python_Settings' already exists

Your configuration is wrong. Just remove duplicated option 'cursor-foreground' (and other duplications if they exist).

However 2.7 and 3.1 are tolerant for this. This is an IDLE bug, a regression in 3.2.

Thank you Serhiy Storchaka.
It worked well. I did not noticed that. 
Thanks again.

ConfigParser is more strong by default since 3.2. Here is a simple patch which made IDLE more tolerant for such kind of user errors.

How can i install this patch?

New changeset cf98766f464e by Serhiy Storchaka in branch '3.2':
Issue #17114: IDLE now uses non-strict config parser.
http://hg.python.org/cpython/rev/cf98766f464e

New changeset c2ed79fbb9c6 by Serhiy Storchaka in branch '3.3':
Issue #17114: IDLE now uses non-strict config parser.
http://hg.python.org/cpython/rev/c2ed79fbb9c6

New changeset 877fae8d6f5b by Serhiy Storchaka in branch 'default':
Issue #17114: IDLE now uses non-strict config parser.
http://hg.python.org/cpython/rev/877fae8d6f5b

Just wait a few weeks to release of 3.2.4 and it's appearance in your distribution.