Someone - I don't remember if it was Jason, Kuhan or Oxana - mentioned some time ago that you can use the idea-ID found under the header in the idea to create the short-url for it. And since then I use that one, because the long url won't change correctly to the text-url most of the time. ^^
@Thanga: Is the already mentioned idea not the same as you suggest? I just want to understand the reason for creating another idea with the same topic. Kind of ironic to when thinking about the topic. 
Regards,
Steffi.