Python upgrade

[stormcloud <email forward me googlemail com>]

Hi,

Recently I upgraded the version of Python on my machine, and since then Meld has refused to run. - I keep getting the following error:

  File "/usr/share/meld/meld", line 78, in <module>
     import gtk
  ImportError: No module Named gtk

I'd like to be able to point meld back to the older version of python (which is still on my machine). 

Could somebody give me some pointers.

Thanks.